Valve has ditched cross-platform play in upcoming downloadable shooter Counter-Strike: Global Offensive.
The Half-Life maker had planned to allow PC and Mac players to face off against PlayStation 3 owners - as it did with Portal 2.
But Valve removed the functionality based on feedback gleaned from the ongoing beta, Chet Faliszek told Joystiq.
"The beta has proved we want to update not just the beta, but the game itself post-launch frequently on the PC," he said.
"To do that we need to separate the platforms so one doesn't hamstring the other. So for that, we have removed the idea of cross-platform play - essentially make all platforms stronger by not mixing them."
CS:GO is still on course for release on PC, PS3 and Xbox 360 this summer.