yes u go to play multiplayer and then u go to co op then u press a then u play the lvl u want to
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Up to two players can play in the Co-Op Campaign mode on Halo: Combat Evolved.
There should be a co-op in Halo reach because there was in Halo 3 and ODST why would they stop co-op there?
As far as I know there isn't a co-op mod for the PC
you plug in the controller and then you can just move the person
halo