This RPG does something that I believe every RPG should: It makes player choice feel meaningful. The character creation system, with its S.P.E.C.I.A.L. stats, perks and skills allow for a wide range of different builds and combinations, with many perks deeply inlfuencing and altering gameplay and possible actions you can take. This is something that is reflected on the rest of the game too, there are many different weapons to choose and combine with others, and there is almost always multiple ways of solving a problem, either through violent, pacifist, or some other means. You're never forced to follow a specific path or solution to a quest, and the game often rewards you with XP for taking a less obvious approach to solving a problem. For me, player choice is the strongest point of this game. The ambientation in general is really good too. It's not just a post apocalyptic world, but one that is slowly rising from its ashes, with new societies and power structures developing, many interacting with one another. The simplistic graphics allow your mind to "fill in the gaps" of what some parts look like, while the ambient music compliments it by setting the foreboding tone of a dying world that refuses to give up. Unfortunately, the game has lots of cut content and bugs, and it is quite obvious sometimes, such as random crashes, crashing when alt-tabbing, and quest that appear on your menu but can't be completed because they aren't finished, but these problems are never big enough to distract from the main experience.
Despite it's flaws, Fallout is a really good game, with meaningful player choice, good ambientation and not very long, but still very memorable.
Linux Compatibility (for me): Other than the bugs mentioned, the game runs well.
I used Proton Experimental this time for the game, through April 23 to May 07, but any recent version of Proton should give good, if not better results.