I used to play Counter-Strike but switched to Ubuntu 17.04 and no longer have CS. I tried to install it using Wine but it didn't work properly, so I would like to find free alternatives.
The game should have different maps to play in as well as different game modes. It will have to be first-person, like the original game. The graphics need to be ok, but not to bad. There should be different kinds of guns, like snipers, rifles, shotguns and ETC.