Pokemon Infinite Fusion

Game: Pokemon Infinite Fusion is a Windows fan game built on RPG Maker XP (RGSS3 runtime). Portable/standalone — extract and run, nothing to install.

Download: Get the standalone Windows zip from the official Discord (discord.gg/infinitefusion). The download root contains Game.exe (the main launcher, which streams fusion sprites on the fly) plus the bundled runtime.

Install: Extract to a folder on the Deck (e.g. ~/Games/PokemonInfiniteFusion/). Add Game.exe as a non-Steam game, then in Properties > Compatibility check 'Force the use of a specific Steam Play compatibility tool' and select GE-Proton (install via ProtonUp-Qt from Discover).

Proton: GE-Proton9-20 works; community guides also report plain Proton 7.0 running fine. Try a different version if it fails to launch.

Runtime: The RGSS3 runtime is bundled in the download — no separate RPG Maker install needed.

Controller: Game.exe itself has limited native gamepad support — players usually lay a Steam Input keyboard layout over it (map d-pad/face buttons to arrows + Z/X/Enter), or use the touchscreen/trackpad for menus. For better out-of-the-box pad support, launch the alternate InfiniteFusion-performance.exe instead (same game, the performance/alt launcher, which adds full controller support but needs sprites pre-downloaded locally).

First launch: Initial loading screens can take a while the first time; this is normal.

Offline: No internet connection or owned game files required (Game.exe does fetch fusion sprites over the net on demand; the alt/performance launcher runs fully offline from a local sprite pack).