no you can't.
To be more specific, Gears of War 3 only plays on XBox(360), but it is possible that it can play on PlayStation 3. :) - External, helper of AE games, and Roblox.
It is software that was written to operate on the Xbox 360 and will not run on the PS3. The question did not even ask if you could play an Xbox 360 version of the game on a PS3. Is asked if a PS3 version was available and it is not.
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The game has two sequels, Gears of War 2 which is out now and Gears of War 3 that is released in April 2011. Gears of War 3 is supposed to be the last.
Baird does not die.
There will be a Gears of War 3 coming out in April 5 in USA, and April 8 World Wide 2011. This will be the Final sequal to Gears of War 1 and 2.
maybe
gears of war is the best but gears of war 2 is better