Valve finally released Counter Strike: Global Offensive for Linux.
Counter Strike: Global Offensive (CS:GO) is an objective-based multiplayer first-person shooter in which players join either the Terrorist or Counter-Terrorist team. CS:GO uses the Source engine and it was initially released in August, 2012, as the fourth game in the Counter-Strike franchise.
Compared to the previous games in the series, CS:GO includes ranked match-making, extra weapons and equipment, new and revamped maps along with extra modes (Arms Race, Arsenal: Demolition - which combines Defuse and Arms Race, and Deathmatch) and more.
In my short test under Ubuntu 14.10, I didn't encounter any major issues while playing CS:GO, even with my laptop's integrated Intel graphics. However, since the game was just released for Linux, expect to find some bugs (check out this Reddit thread for some potential issues) - if you encounter bugs, report them @ GitHub.
Note that game Steam page wasn't updated to show the newly added Linux support so it won't show up in the Linux section yet, but this should change soon.
Buy Counter Strike: Global Offensive via Steam (£11.99 / $14.99)