Counter-Strike: Global Offensive details: PC-PS3 play; Competitive & Casual modes

Valve mentioned last week that it hoped to have cross-platform multiplayer in its downloadble Counter-Strike revamp Counter-Strike: Global Offensive, and, lo and behold, it's now official. Between PC, Mac and PlayStation 3, at least. A whole host of other details have spilled forth too.

CS: GO players on the PlayStation 3 will be able to play with their chums on PC and Mac, Kotaku reports, as with Portal 2. So they have a chance of holding their own against their PC counterparts, the PS3 version will support keyboard and mouse. If you want to play worse than you would with a controller, though, it also has PlayStation Move support. Sadly there's no word on whether the Xbox 360 edition will join the cross-platform party too, but we live in hope.

Kotaku also details CS: GO's both Competitive and Casual modes, where the former's more like classic CS and the latter's intended to ease new players in. In Casual mode, players don't need to pay for weapons or armor, round and bomb timers are longer, and can chat with and spectate players on both teams. Not so in Competitive. There, you'll still need to save up and buy your gear, and communication and spectating are locked down. Of course, you'll still be able to tweak things if you run your own server.

Valve intends to run many servers of its own though, to offer a tightly controlled and consistent experience. Only these servers will be ranked. Player rankings will be used for matchmaking in Competitive mode, while Casual matchmaking will go by your friends list.

Counter-Strike: Global Offensive is headed to PC, Mac, Xbox Live Arcade and PlayStation Network in the first quarter of 2012. It'll initially launch with seven maps, tweaked versions five classic 'de_' bombing maps and two 'cs_' hostage scenarios. A PC beta is slated to begin in October.

Here's the debut trailer:

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