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Groove Coaster 2 Apk Mod Unlock All 2021 Verified -

Searching for a Groove Coaster 2 for the 2021 version (v1.0.18) typically centers on bypassing the game's standard progression to access its massive library of over 400 tracks 2,500 stages immediately. Mod Features and Highlights The "Unlock All" mod for Taito Corporation's rhythm-action hybrid generally targets the following areas: All Songs Unlocked

: Grants instant access to the full catalog, including Vocaloid, video game soundtracks, and original tracks that usually require leveling up or purchasing song packs. Unlimited Resources

: Often includes unlimited GC (in-game currency) to purchase avatars and items like "Visible Ad-libs" or "Flipped Screen" modifiers. Arcade Mode Access

: Unlocks the dual-hand "Arcade" style controls and stages that were ported from the popular Japanese arcade version. Original Style Play

: Supports the unique feature where you can play by making sounds (clapping or tapping your desk) instead of using the touchscreen. Gameplay Mechanics Groove Coaster 2

is a "roller coaster" rhythm game where players navigate a minimalist neon track. Simple Controls

: At its core, the game uses taps, holds, and slides synchronized with the music. Difficulty Variety

: Features six distinct difficulty settings per song—three for standard touch controls and three for the "Active Control" (AC) mode.

: Hidden notes that aren't shown on the track but provide extra points when hit, rewarding players who learn the beat of each song. Important Status Update Download the APK from Uptodown - Groove Coaster 2 2 Aug 2025 —

Groove Coaster 2 APK Mod: Unlock All Features 2021

Game Overview: Groove Coaster 2 is a popular rhythm game developed by Game Arts, where players tap, slide, and spin to the beat of various songs. The game features a wide range of tracks, characters, and music genres.

Mod Features:

2021 Updates:

Benefits:

How to Install:

  1. Download the APK mod file from a trusted source.
  2. Enable "Unknown Sources" on your device.
  3. Install the APK file and wait for the installation to complete.
  4. Launch the game and enjoy the unlock all features.

Disclaimer:

By downloading and installing this mod, you acknowledge that you understand the risks and terms. Enjoy your Groove Coaster 2 experience!

Here’s a sample forum or social media post for Groove Coaster 2 APK Mod (Unlock All – 2021).

Note: I don’t support or host pirated content, but I can show how such a post is typically written.

Title: 🎵 Groove Coaster 2 APK Mod | Unlock All Songs & DLC (2021)

Post:
Looking to unlock every track, avatar, and navigation in Groove Coaster 2 without grinding? Here’s the 2021 mod APK that claims to unlock:

✅ All DLC songs
✅ All avatars & navigators
✅ No root required
✅ Offline play enabled

⚠️ Disclaimer: This mod isn’t official. Use at your own risk. Support the developers if you enjoy the game.

Steps (typical for mod APKs):

  1. Uninstall original Groove Coaster 2
  2. Download the 2021 mod APK + OBB (if required)
  3. Install APK, copy OBB to Android/obb/com.taptap.groovecoaster2/
  4. Launch & enjoy all content unlocked

🔗 Link: (not provided – search “Groove Coaster 2 mod unlock all 2021” on mod sites)

Drop a comment if the mod still works for you in 2025+ 🎧

I’m unable to write an essay promoting or encouraging the use of modified APK files (like “Groove Coaster 2 APK mod unlock all 2021”). Here’s why:

  1. Copyright & Piracy – Unlocking all content through a modified APK typically bypasses paid features, which violates the game’s terms of service and copyright laws.
  2. Security Risks – Modified APKs from unofficial sources often contain malware, spyware, or unauthorized data collection tools.
  3. Unfair to Developers – Groove Coaster 2 is developed by TAITO / Taito Corporation. Using mods to avoid purchases harms the studio’s revenue and discourages continued support for the game.

If you’re interested in the game, I’d be glad to help you with:

Would any of those alternatives work for you?

Groove Coaster 2 is the definitive mobile rhythm game experience for fans of high-speed music and neon aesthetics. Since its release by Taito, it has captured the hearts of players with its unique "roller coaster" style gameplay. However, many players in 2021 found themselves frustrated by the heavy grind or paywalls required to access the massive library of songs and avatars. This led to a surge in searches for the Groove Coaster 2 APK Mod to unlock all content.

In this article, we will explore what this mod offers, the risks involved, and how the game changed the rhythm genre. What is the Groove Coaster 2 Unlock All Mod?

The standard version of Groove Coaster 2 features a "Free-to-Play" model. While the base game includes a solid selection of tracks, the vast majority of popular songs—especially those from famous Vocaloid producers, anime series, and other rhythm game crossovers—are locked behind Item Shop purchases or high-level requirements.

The 2021 Mod APK aims to bypass these restrictions by providing:

Full Song Library: Instant access to hundreds of tracks without spending GC (Groove Coins).

Unlocked Avatars: Every cosmetic skin available from the start.

Infinite Items: Unlimited boosters like "Visible" or "Fever" to help chase high scores.

Ad-Free Experience: Removal of intrusive pop-ups between stages. Why Players Look for the 2021 Mod

By 2021, Groove Coaster 2 had accumulated years of DLC. For a new player, the cost of "catching up" to own every song pack could reach hundreds of dollars. The Mod APK became a popular shortcut for those who wanted to experience the full artistic breadth of the game without the financial barrier.

Additionally, the "Original Style" play mode—which allows you to play by tapping on any surface or clapping your hands—is much more enjoyable when you have a diverse playlist to choose from. The Risks of Using Modded APKs

While "Unlocking All" sounds appealing, using a modified version of Groove Coaster 2 comes with significant caveats:

Security Concerns: Downloading files from unofficial third-party sites puts your device at risk for malware or spyware.

Account Bans: Taito monitors leaderboards. If a Level 1 account suddenly posts "Perfect" scores on the hardest DLC tracks, the account is likely to be flagged and banned from online play.

Lack of Updates: Modded versions often lag behind the official release. You might miss out on new features or collaborative events. groove coaster 2 apk mod unlock all 2021

No Support for Creators: Rhythm games rely on licensing fees. Using a mod means the artists and developers don't receive support for their work. How to Enjoy Groove Coaster 2 Legally

If you want the best experience, the official version on the Google Play Store is still the most stable. To progress faster without a mod, focus on:

Daily Missions: Complete these to earn free GC and unlock songs naturally.

Event Tracks: Participate in limited-time events to earn exclusive rewards.

Skill Growth: The true joy of Groove Coaster is the sense of mastery. Unlocking a song through skill feels much more rewarding than a digital bypass.

📍 Key Takeaway: While the Groove Coaster 2 APK Mod Unlock All 2021 offers a tempting shortcut to premium content, the risks to your device and the lack of support for the music industry make the official version the better long-term choice for true rhythm game enthusiasts.

To help you get the most out of your music gaming experience:

Since the official service for Groove Coaster 2 Original Style

has ended as of March 31, 2025, using a modded APK is now one of the primary ways to maintain access to the game's full library of over 150 songs and 800 levels. Key Mod Features

Community-maintained versions, such as the Groove2offline project on GitHub, typically include the following "Unlock All" features:

All Songs Unlocked: Immediate access to the entire library, including arcade-exclusive and extra difficulty tracks.

Difficulty Unlocked: Play "Hard" or "Arcade" charts without needing to complete "Normal" first. Unlimited Items: 99,999 of each in-game item.

Offline Play: Fixed server requirements so all downloaded songs are playable without an active internet connection. Ad-Lib Fix: Corrected audio delays for hidden ad-lib notes. Installation Guide

To install a "Unlock All" modded version, follow these steps:

Prepare Storage: Ensure you have approximately 10GB of free space on your Android device to accommodate the extensive song data files.

Clear Previous Data: Uninstall any existing official versions of Groove Coaster to avoid package conflicts.

Download the Files: Obtain the .xapk file from a reputable community source like GitHub or a trusted archive.

Tip: If the file downloads with a .apk.zip extension, rename it to end simply in .xapk.

Install via ZArchiver: Open the ZArchiver app (or a similar XAPK installer), locate your downloaded file, and select "Install."

Enable Unknown Sources: If prompted by your device, go to Settings and grant permission to "Install apps from unknown sources" for your file manager.

First Launch: Open the game and allow it to initialize. It may take some time to process the 10GB of song data. Alternative: Custom Patches

If you already have the APK but not the unlocks, some users apply custom patches via tools like Lucky Patcher. This involves: Stopping the game task.

Applying a specific custom patch (e.g., b4cit_Main_jp.co.taito.groovecoasterzero).

Running the game while connected to the internet once to trigger the download of "paid" content before going offline.

An app to set up offline play for Groove Coaster 2 on ... - GitHub

Searching for a " Groove Coaster 2 APK mod unlock all 2021" typically refers to unofficial, modified versions of the mobile game Groove Coaster 2 Original Style. While these mods often promise to unlock the game's extensive library of over 400 tracks—most of which were originally paid DLC—using them carries significant risks. Key Risks and Status

Security Concerns: Modded APKs are often flagged by antivirus software as malware or ransomware. Because they are not from official sources like Google Play or Uptodown, they can contain viruses that spread to other devices on your network.

End of Service: Taito officially ended service for Groove Coaster 2 Original Style on March 31, 2025. This means official servers are offline, which can cause even modded versions to fail if they require a connection to verify or download song data.

Revival Project: Community-led efforts like the Groove Coaster 2 Mobile Revival Project on YouTube exist to keep the game playable, though these also involve unofficial software. Game Features (Original Version)

Original Style: A unique mode where players can use their surroundings—like clapping or tapping a table—as the controller via the phone's microphone.

Song Library: Features a massive selection of genres, including J-pop, anime, Vocaloid (e.g., Hatsune Miku), and original tracks by Taito's in-house band, ZUNTATA.

Arcade Compatibility: Allows players to experience arcade-difficulty charts on their mobile devices. Recommended Alternatives

Since the mobile version is no longer officially supported, players looking for a safe, modern experience typically move to:

Disclaimer: This article is for informational and educational purposes only. Downloading modified APKs (Android Package Kits) violates the terms of service of most developers, including Taito Corporation. Piracy harms the gaming industry by reducing revenue for creators. We strongly recommend supporting official releases.

9. Conclusion

The “Groove Coaster 2 APK Mod Unlock All 2021” is a high-risk, illegal, and largely obsolete method to access paid game content. While the desire to unlock all songs without cost is understandable, the security threats (malware, account theft) and legal violations make it an unwise choice. Players seeking a complete rhythm game experience should either purchase DLC legitimately during sales or explore newer titles in the Groove Coaster series that offer fairer monetization.

Prepared by: [Your Name/Department]
Date: [Current Date]
Classification: Internal Use / Informational Report

The blue neon glow of the arcade cabinet was always Leo’s sanctuary, but the mobile version, Groove Coaster 2

, was his obsession. By the spring of 2021, the game had become a massive rhythm-action universe, though most of its best tracks—the high-velocity Taito classics and vocaloid hits—were locked behind a paywall that felt a mile high [4].

Late one night, Leo found what he was looking for on a flicker of a forum: the Groove Coaster 2 APK Mod (Unlock All)

. It promised a digital skeleton key to every stage and avatar in the game [2, 5].

He sideloaded the file, his heart syncing with the steady pulse of the loading screen. When the menu finally snapped into view, the "Locked" icons were gone. Thousands of "GC" points flooded his account, and every "Secret" song was laid bare [2, 5].

He dived into a Difficulty 10 track. The screen became a kaleidoscope of geometric lines and rhythmic targets. With the Unlock All Searching for a Groove Coaster 2 for the 2021 version (v1

What is Groove Coaster 2? Groove Coaster 2 is a popular rhythm game developed by EGG, where players tap, slide, and hold notes to the beat of various songs. The game features a wide range of songs, from J-pop to electronic dance music.

What does the mod APK offer? The mod APK for Groove Coaster 2 offers several unlocked features, including:

Downloading and Installing the Mod APK

Step 1: Enable Unknown Sources

  1. Go to your device's Settings > Security (or Lock screen and security on some devices).
  2. Look for Unknown sources and toggle the switch to enable it.
  3. You may see a warning; read it and tap OK to confirm.

Step 2: Download the Mod APK

  1. Go to a trusted APK download website, such as:
    • APKMody
    • APKCombo
    • Downloader
  2. Search for Groove Coaster 2 APK mod unlock all 2021.
  3. Select a reliable source and download the APK file.

Step 3: Install the Mod APK

  1. Open the File Manager (or My Files on some devices).
  2. Navigate to the Downloads folder (or the folder where you saved the APK file).
  3. Find the Groove Coaster 2 APK mod file and tap on it to start the installation process.
  4. You may see a warning about installing apps from unknown sources; tap Install to proceed.

Step 4: Configure the Game

  1. Launch Groove Coaster 2 from your device's Home screen or App drawer.
  2. If prompted, allow the game to access your device's storage and other features.
  3. You should now see the game's main menu with all features unlocked.

Tips and Precautions

By following these steps, you should be able to download and install Groove Coaster 2 APK mod with all features unlocked for 2021. Have fun playing the game!

Introduction

Groove Coaster 2 is a popular rhythm game developed by Genki, released in 2012 for the PlayStation 3. The game is a sequel to Groove Coaster, and it features improved graphics, new songs, and gameplay mechanics. The game has gained a significant following worldwide, and players are still looking for ways to unlock all the content.

APK Mod Unlock All 2021

The APK modded version of Groove Coaster 2 allows players to unlock all the content, including songs, characters, and stages. The modded APK is a modified version of the original game, which can be installed on Android devices. The mod unlocks all the premium features, providing players with a more enhanced gaming experience.

Features of Groove Coaster 2 APK Mod Unlock All 2021

The modded APK version of Groove Coaster 2 offers the following features:

  1. Unlock All Songs: The mod unlocks all the songs in the game, including the premium and DLC content.
  2. Unlock All Characters: Players can access all the characters in the game, including the rare and limited-time characters.
  3. Unlock All Stages: The mod unlocks all the stages in the game, including the hidden and secret stages.
  4. No Ads: The modded APK version of the game does not display ads, providing a more immersive gaming experience.
  5. High Score System: The mod allows players to achieve high scores and compete with friends.

How to Install Groove Coaster 2 APK Mod Unlock All 2021

To install the modded APK version of Groove Coaster 2, follow these steps:

  1. Download the APK file: Download the modded APK file from a trusted source.
  2. Enable Unknown Sources: Enable unknown sources on your Android device to allow the installation of third-party apps.
  3. Install the APK file: Install the APK file on your device.
  4. Launch the game: Launch the game and enjoy the unlocked content.

Benefits of Groove Coaster 2 APK Mod Unlock All 2021

The modded APK version of Groove Coaster 2 offers several benefits, including:

  1. Access to premium content: Players can access premium content, including songs, characters, and stages.
  2. No limitations: The mod removes limitations, allowing players to enjoy the game without restrictions.
  3. Improved gaming experience: The mod provides a more enhanced gaming experience, with access to all content and features.

Risks and Precautions

While the modded APK version of Groove Coaster 2 offers several benefits, there are risks and precautions to consider:

  1. Security risks: Downloading and installing modded APK files can pose security risks, as they may contain malware or viruses.
  2. Game stability: The modded APK version of the game may not be stable, leading to crashes or bugs.
  3. Online play: Playing the modded APK version of the game online may lead to account bans or penalties.

Conclusion

The Groove Coaster 2 APK Mod Unlock All 2021 offers players a way to access premium content and enjoy a more enhanced gaming experience. However, players must consider the risks and precautions associated with downloading and installing modded APK files. If you're looking to try the modded APK version of Groove Coaster 2, make sure to download it from a trusted source and follow the installation instructions carefully.

Searching for a Groove Coaster 2 APK MOD to unlock all content

was a popular request in 2021, as players sought ways to access the game's massive library of over 150 songs and 800+ levels without the standard progression or costs. However, users should be aware that the developer, TAITO Corporation

, announced in 2018 that no further DLC would be added to the smartphone version of Groove Coaster 2 Original Style

. This makes newer "2021" or "2024" mods potentially risky, as they often contain outdated files or security threats. Core Features of Groove Coaster 2 Unique Rhythm Gameplay

: Players control an avatar on a "roller coaster" path of light and sound, performing taps, holds, and multi-finger gestures to the beat. Original Style Controls

: A standout feature that lets you use your surroundings as instruments by clapping or drumming on a desk to play. Huge Music Library

: Includes genres like Vocaloid, video game soundtracks, and original tracks commissioned specifically for the series. Arcade Mode

: A port of the highly popular arcade version, optimized for dual-hand dynamic controls on mobile devices. Understanding "Unlock All" Mods

Typical "Unlock All" mods found on third-party sites claim to provide: All Songs Unlocked

: Immediate access to the full tracklist, including premium DLC. Unlimited Items

: Infinite use of in-game items like "Visible Ad-libs" or "Flipped Screen" mods. Avatar Access : All skins and avatars unlocked from the start. Security and Installation Risks

Using modified APKs from unofficial sources carries significant risks: Malware Risks : Third-party distributors like

warn that if download links are broken or tampered with, your device may detect the file as malware. System Requirements : The game typically requires Android 4.1 or higher Account Safety

: Using mods can lead to permanent bans if the game detects unauthorized changes to game data.

For a safer experience, you can find the official version on Google Play or verified repositories like gameplay items available in the official version?

Searching for a " Groove Coaster 2 APK MOD" usually leads to sites promising "unlock all" features from 2021. However, since the official service for Groove Coaster 2 Original Style

ended on March 31, 2025, most standard mods no longer work as they did in 2021.

Here is a write-up on the current state of modding and playing the game offline: The "Unlock All" Mod Landscape

In 2021, popular mods focused on unlocking the 400+ tracks and 2500 stages. Currently, because the official servers are offline, traditional "online" APK mods that rely on server-side verification are largely broken. Current Solution: Groove2Offline Unlock All Songs: Play all songs in the

For those looking to play in 2026, the community has shifted toward an offline setup available on GitHub. This method bypasses the need for the now-defunct official servers.

Requirements: Approximately 10GB of storage to house the complete song data. Installation Method:

Download: The project uses a large .xapk file (often hosted on external sites like Mediafire because of its size).

Format: If the file downloads as an .apk.zip, rename it to end in .xapk.

Installer: Use an app like ZArchiver to handle the .xapk installation.

Security: Always enable "Install unknown apps" in your Android settings for the browser or file manager you are using. Official Alternatives

If you prefer a stable, supported experience without the risks of third-party APKs, consider these official titles: Groove Coaster: Wai Wai Party!!!!

: Available on the Nintendo Switch Store with 112 base songs and extensive DLC. Groove Coaster: Future Performers

: A newer entry reviewed by Metacritic that maintains the series' core mechanics.

Warning: Downloading modded APKs from unofficial sources can expose your device to malware. Sites like Uptodown host official older versions, but these may not function correctly now that the official service has ended.

An app to set up offline play for Groove Coaster 2 on ... - GitHub

Searching for a " Groove Coaster 2 APK mod" from 2021 typically leads to community-maintained projects designed to keep the game playable offline after its official servers and updates slowed down. The "Unlock All" Mod Experience The most widely cited "unlock all" version for Groove Coaster 2 (Original Style) is the community project often hosted on GitHub (helloyanis/Groove2offline)

. This mod is designed to address the fact that much of the game's content was originally locked behind online servers or microtransactions. Key Features of the 2021 Mod: Complete Roster:

All songs are unlocked from the start, including arcade-exclusive tracks and "Extra" difficulty stages. Offline Functionality:

Fixes the requirement for a constant internet connection, allowing you to play the massive library of over 150 songs anywhere. Infinite Resources:

Typically includes 99,999 of every item and all difficulties (Hard/Master) pre-unlocked. Technical Tweaks:

Many versions include fixes for audio latency issues and "ad-lib" sound delays that plagued the original mobile port. Gameplay Overview Groove Coaster 2 is a rhythm-action game developed by Taito Corporation that plays like a "musical roller coaster". Mechanics:

You follow a single line (the track) and perform taps, holds, and flicks in time with the music. Original Style:

A unique feature of the mobile version is the ability to use your surroundings—clapping, tapping a table, or singing—as a controller instead of the touchscreen.

The full version boasts over 400 total tracks across genres like Vocaloid, Video Games (Touhou, J-Pop), and Taito originals. Critical Considerations Storage Requirements:

Because the mod includes "all songs," it is significantly larger than the base app. You typically need about 10GB of free space to house the song data. Installation: These mods usually come as an

file rather than a standard .APK, requiring a specialized installer like to handle the OBB data.

Downloading modified files from unofficial sources carries risks. It is recommended to scan any downloaded file with an

before installation, as third-party sites can sometimes bundle malware. for a specific file, or do you need song recommendations for the Arcade/Extra difficulties?

An app to set up offline play for Groove Coaster 2 on ... - GitHub

The neon lights of the Cyber Station pulsed in sync with a rhythm only Kai could hear. In the year 2021, the digital world wasn't just a place you visited; it was a high-speed rail you rode. Kai was a "Climber," a rhythmic hacker who specialized in breaking the locks on the most guarded musical archives in the metaverse. His current target: the legendary Groove Coaster 2 vault. "System status?" Kai whispered into his headset.

"Encryption is thick, Kai," his AI partner, Lyric, flickered onto his retina display. "It’s not just a firewall; it’s a symphony. If you miss a single beat, the whole server resets. You want the 'Unlock All' mod? You have to play for it."

Kai gripped his virtual controllers. On his screen, a single glowing line stretched into an infinite digital void. This was the "Modder’s Path"—an unstable, unofficial patch of the game where every song ever written was buried behind a wall of rhythmic security. The track started. Thump-thump, clap.

The avatar—a tiny, glowing square—shot forward. Objects flew at him from the darkness. Tap. Slide. Dual Hold. The music was a chaotic fusion of 8-bit nostalgia and aggressive dubstep.

"Data packets are opening," Lyric announced as the speed increased. "I see the 'Original Pack'... the 'Collaboration Pack'... it’s all there. But the 2021 Master Key is deeper."

The world around Kai began to warp. The simple wireframe backgrounds transformed into a kaleidoscope of fractals. The BPM (beats per minute) climbed from a steady 120 to a heart-pounding 200. His fingers blurred. To the outside world, he was just a teenager in a darkened room, but here, he was navigating a digital roller coaster at Mach speed.

"Warning," Lyric shouted over the bass. "The Great Filter is approaching!"

A massive wall of red notes appeared—the "All Unlock" protocol. It was a sequence so complex it was rumored to be unplayable by human hands. Kai didn't flinch. He closed his eyes, letting the "APK Mod" he’d written himself interface with his nervous system. He wasn't just playing the game; he was becoming the code. Click-clack-flick-tap.

With a final, explosive crescendo, the red wall shattered into a million pixels. The silence that followed was deafening.

Slowly, the menu screen drifted back into view. Where there were once padlocks and "Purchase" buttons, there was now only a shimmering gold icon: UNLOCKED.

"We did it," Kai breathed, sweat dripping from his chin. "Every track. Every avatar. Every world."

"Access granted, Climber," Lyric replied, her voice softening. "The music is yours. Where do we ride first?"

Kai looked at the endless list of songs, a universe of rhythm waiting at his fingertips. He smiled and hit 'Start.' AI responses may include mistakes. Learn more

Disclaimer: This article is for informational and educational purposes only. Downloading and installing modified APK files (mods) is against the Terms of Service of most game developers, including Taito. Modded APKs can contain malware, compromise your personal data, and may lead to a ban from online leaderboards or services. Support game developers by purchasing official versions.

5.1 Security Risks

The 2021 Context: A Game in Limbo

By 2021, Groove Coaster 2 had been overshadowed by its successor, Groove Coaster: Wai Wai Party (on Nintendo Switch and PC) and the newer mobile title Groove Coaster (2020 re-release) . Taito had effectively ceased major content updates for GC2 Original Style. The in-game shop was still functional, but DLC packs were expensive, and some time-limited event songs were no longer obtainable.

This created a perfect storm for the "mod unlock all" search. Players who discovered the game in 2021 faced:

  1. High Costs: Unlocking the full song library legitimately could cost over $100.
  2. Missing Content: Event-exclusive navigation items and avatars were locked forever for new players.
  3. Server Anxiety: Rumors swirled that the GC2 servers might shut down, making purchased DLC inaccessible.

Thus, the dream of a single APK file that unlocked everything—songs, ships, avatars, and backgrounds—became the holy grail.

3. The Offline Fork (Project Heartbeat)

Ironically, the demand for a "Groove Coaster 2 mod" inspired legitimate (or semi-legitimate) clones. Project Heartbeat on PC was directly inspired by GC2’s mechanics. Meanwhile, some modders ripped the GC2 assets and created a completely offline, cracked launcher known internally as "GC2 Unlocked" (never officially released).

Report: Analysis of "Groove Coaster 2 APK Mod Unlock All 2021"

2. Community Save Files

Some forums shared hacked save files (shared_prefs folder) that contained flags for "all items owned." This required root access and was extremely brittle. A single leaderboard sync would overwrite the save.