I have won this on steamgifts website (ohh my, it was years resting in my backlog it seems)
The gunslinger is much better, still I had planty of fun with it. Graphics is ok. I have enjoyed the gameplay for the most of the part (duels are somewhat frustrating though). The possibility to choose "brother" to play is a nice future.
It plays without issues on Linux through Steamplay (Proton).

extremely fun one of the only games iv'e completed and that's a lot iv'e never finished fnv even though i have 1200 hours as of writing. Feels like cod 1 but in the old west

Apart from very bland fps gameplay, this is actually pretty solid for 2009. Worth a buy on a deep discount