4th game in the CS series. This will be developed by VALVe and Hidden Path Entertainment, which also helped develop CS:S.
"Debuting in early 2012 on Steam (for the PC and Mac) Xbox Live Arcade, and PlayStation Network, Global Offensive features new game modes, weapons, maps, and characters to the franchise. This will mark the series' first appearance on XBLA and the PSN.
Additionally, gamers will be able to fight on updated versions of original Counter-Strike maps including de_dust and others. Lastly, Global Offensive will support matchmaking and leaderboards." - Gamespot.