I run Stalker: Gamma on a Steam Deck.

Tips: Install it using Windows and just move the Anomaly and Gamma folders over to the same directory. Make sure to pick a wine version with esync and fsync patches or it will run like shit.

As for controlling Stalker with a controller… I’m working on it, myself. I pretty much bound everything as you’d expect in a normal FPS and made the back buttons work for healing items and melee. Select for the PDA, Start for pause.