Generic PMC name: Generic anti-terror expression is a pretty nice online FPS for XBLA and PSN (15$ on both AFAIK) that came out yesterday, not groundbreaking but fun anyway. There's a set of coop missions where you fight against deliberately dumb enemies (i.e. they suck but they outnumber you so it's happy target shooting and if you aren't careful they'll still kill you fast) but so far I've only played them alone (needs friend invites, don't have any friends who I know have the game). I'm liking the team deathmatch in the game way more than in CoDMW2 since there are defined spawn areas so you know where the enemy is going to come from (can't count how often I've been running around in the middle of nowhere in MW2 TDM since I had no idea where the enemies were). Unfortunately it doesn't seem to refill teams once people start leaving so we ended one TDM with three players against six.
The coop missions against dumb enemies aside the game also boasts about its weapon customization, basically the weapon has 6 components or so that you can exchange (once you unlock parts...) but some of them don't really seem to have an effect (e.g. the sights don't seem to do anything except get in the way, if you use iron sights without a sight installed you get the standard HUD crosshairs with proper spread display) and I'm not really certain what the stat icons mean. Some items seem like they are wholly superior to others but without knowing what stats are and aren't displayed I can only guess. There are weapon tags which I don't really like, they look like cosmetic items but really give stat boosts too, I wish you could pick them based on which looks cool instead of which gives the best stat bonuses.
Overall the variability might sound like the game gets unfair but so far it seems that since damage outputs are fairly high it doesn't matter much what you do with your weapon.