attack and defence are really the only virtues of conflict that can be portrayed into OFP in a co-op manner, things like recon wouldn't go down well online since nothing happens, but check out Purchasing Power by Animal if you he's still doing it, it's like C&C OFP, but i'd like to see something like air support, or you have to fly a bunch of guy's in and out of a hot zone, or SAR or something like that, so it's attack and defence at the same time, but you've gotta keep moving