Xbox game pass has a lot of games to choose from and they add more every month. Not only does xbox game pass covers pc, if you get the ultimate it covers console, cloud gaming and you can play games from your phone with the help of the touch screen controller or a hand held. It normally will tell you which one needs a controller and which has the on screen controller. The cloud games have a few xbox 360 games also that you can play which is nice.
If you do not know what game can run on your pc do not worry, It will tell you what games should run great. Although it says it will run great you may have to tweak your graphics a little just to be sure that it can run. If the game does not say it should run great it is fine, you can still play it just means you may have to adjust your graphics.
If you do decide to get the game pass it is worth it since new game are coming to it every month while a lot of older games that are on the pass goes off. There are also a lot of new release games that are added to the pass even before it is even released like Atomic Hearts and a few others that will allow you to pre download them but you cannot play until they release. You will also get EA play with the game pass and games from Ubisoft and Riot games.