You should try Metro 3033 and Metro First Light. Made by Russians, fighting a (post nuke) war between rebels (you), nazis, and Reds (communists). FPS, of course ;^)
AND... don’t forget Half Life and Half Life 2 :)
I’ve played Metro. It’s okay. I’ve played all the Half Life games and for the life of me cannot figure out why they’ve stopped publishing the series. It’s money being left on the table.