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A Stores section (rail, under Games; Setup › Stores gate) with each store's sign-in, library, storefront shelves and a download queue. Each store has two tabs, Store and Library, and Library filters to All or Installed; libraries open from a saved copy and refresh in the background, with install sizes on every card. Games install to internal storage, or a card chosen at Install time, and are registered in the Steam client as non-Steam games, so they launch through Steam and droiddeck-proton from either the front end or the client. - Downloads: GOG, Epic and Amazon engines in Rust (app/src/main/rust/stores, built by cargo-ndk, nothing compiled in the tree). One adaptive fetch core with a latency brake, stalled-host handoff and every CDN a store offers. Per-stage progress, pause/resume, two-step cancel that deletes, failed downloads kept for retry, a foreground service with Wi-Fi and wake locks and notification controls. - Games tab: store source chips (Steam, GOG, Epic, Amazon, Custom) and store art. - Epic: per-launch exchange code from the app and from Steam's Play button, "Epic sign-in (EOS)", "Launch offline", and a game's web links opened in Android's browser for EOS consent. The EOS overlay crashed games and is left out. - Cloud saves (GOG, Epic): pulled before launch, pushed after the game or the session ends, no upload before a first download, conflicts never overwritten, backups both ways. - Logs: every store line redacted; the engine log goes to daily files.
DroidDeck brings the SteamOS experience to Android: Valve's Steam client in Big Picture on your Adreno handheld, with Windows games through Valve's ARM64 Proton.
Note: DroidDeck does not have a stand-alone website. Do not click on any download links from websites claiming to be the DroidDeck team.
Requirements and install
Use Android 9 or newer on a supported Adreno device (730 or newer, or 8xx). Adreno 6xx is experimental: DirectX 11 uses DXVK 2 and may run, and DirectX 12 games can still crash. Mali, Xclipse, PowerVR, and Adreno 710 are unsupported. No root is required. Allow about 3 GB for the runtime and 1.1 GB more for the desktop and emulators. Install the APK from Releases, install the Linux runtime, then press Play and sign in. Steam downloads on first launch. Install Desktop & apps to use the desktop and emulators. The Store installs Linux apps and games from Flathub (ARM64 builds) with Flatpak; with additional options to install Appimages and set up scripts. Stores (Setup › Stores › "Show Stores in the rail") signs in to GOG, Epic Games and Amazon Games, browses their catalogs and libraries, downloads games into the Games storage and adds each one to the Steam client as a non-Steam game, so it launches through Proton like everything else; the cog on its chip row sets which tab a store opens on and the download speed tier.
Before Steam launches, you must turn off Restrict child processes in Developer options. If this option is not available in developer settings (Android 12 and 13 devices), first launch of Steam will present a "Fix it for me" button, which will help automate the setup process.
Community
Join the DroidDeck Discord for help, Preview builds, and device reports. Bug reports go in its #bug-reports forum; attach the session folder from Download/DroidDeck/ so the logs come with it.
Build
Run tools/build_local.sh with Docker, Java 17, the Android SDK/NDK, and zstd installed. It builds the ARM64 audio sinks from PulseAudio 13.0 and packages them into the APK at app/build/outputs/apk/release/app-release.apk. Set DROIDDECK_PA13_SOURCE_DIR to an existing PulseAudio 13.0 source directory to skip downloading it. To install the APK on an attached device, run tools/deploy_local.sh.
Limits
Compatibility and performance vary by device; hardware validation is limited. Desktop compositing uses software rendering. Firefox sandboxing is reduced under proot. See the session logs in Download/DroidDeck/ when diagnosing problems.
Credits and licence
GPL-3.0. Runtime, shim, input, and controller work build on WinNative and Bannerlator (maxjivi05). LSFG frame generation is from the work of Camille LaVey and the Eden emulator project, following lsfg-vk, ported to WinNative and DroidDeck by @maxjivi05; it needs your own copy of Lossless Scaling and ships none of its shaders. x86 AppImages, and any whose own runtime cannot unpack them, are unpacked with uruntime by VHSgunzo (MIT), shipped unmodified with its licence. See LICENSE. Steam and Proton belong to Valve Corporation; this project is not affiliated with Valve.