Warhammer 40k: Dawn of War 2 Discussion
To a point yes, they are hosted on the same server, but the two instances do not share the same cheat detection. XBL detects mods to the Xbox when a cheat is used in say Halo 3 to make a person invincible. You should be fine when using a trainer on GFWL. I've used one on Halo 2 Vista and Gears of War PC.
It's also a lot less straight forward than single player cheating, and is "viewed" as hacking.
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