this post was submitted on 10 Feb 2026
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Steam Hardware

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I‘ve checked a few of the resources I found here but I seem to be unable to wrap my head around this.

I want to play one specific game purchased from GoG on my Steam Deck. It only has a windows installer. I don’t need a fancy launcher (at the moment). The game has low hardware requirements so should run fine via emulation/proton…

What’s the easiest way to install and add this game to game mode?

Edit: clarification on the launcher. I don’t necessarily need one. If it is the easiest way to get it done I still would consider installing one.

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[–] bjoern_tantau@swg-empire.de 6 points 2 days ago

If you don't want to go the Heroic route (you really should go the Heroic route) you can

  1. download the offline installer from GoG
  2. add the installer as a none-Steam-game to Steam
  3. select Proton for compatibility
  4. run the installer
  5. add the installed game's exe to Steam as a none-Steam-game
  6. select Proton for compatibility

Trouble with that method is that Steam always creates a new Wine prefix (a kind of fake Windows drive) every time you run a new none-Steam-game with Proton. They can pile up and take unnecessary space away. It also makes it harder to install dependencies or mods or add ons.

So yeah, Heroic is the way.