The main gameplay is a 45-min race to take down opposing players while completing a certain task. The difference is that Global Offensive has more game modes so the objective of each game is up to you. The game continues the team-vs-team mechanics of Counter-Strike: Source, pitting terrorists against counter-terrorists. The game is compatible with both Mac and Windows desktops. CS: GO a first-person shooter game developed by Valve and Hidden Path Entertainment. Counter-Strike: Global Offensive is the fourth installment to the Counter-Strike series.