Every time Gloomwood goes on sale I check to see if it's received its long-promised controller support. For years the answer has been "no" or "not yet", and believe me, on most normal days there's a new thread in the Gloomwood Steam forums asking about it. But as of today, the answer is "yes".
That's good news for me and many others who want to play this stealth-oriented immersive sim on Steam Deck or any other handheld PC. While Gloomwood has been 'Playable' on Steam Deck for a while, you needed to make do with your own (or the community's) jury-rigged gamepad layout, and gamepad glyphs weren't in the game. That's a very annoying way to play a first-person Thief-like with complicated controls, but such is people's enthusiasm for Gloomwood that they've been doing it anyway.
