it's a little funny u r saying that 4 players co-op is the obvious choise since i cant remember any decent 4 player coop game that came out in the past 4 years besides Gear of war. every other co-op game i can think of is 2 players. from akne and lynch, army of two, portal 2, lara croft and guardian of light, fable 3......
nope. no good 4 player co-op games i can think of here.
also, critisizing them for creating a game for 2 players is like critisizing basketball to only having 10. it's how the game was built. addd too many players and it'll ruin it. take players and it worse still.
if u want a 4 player coop just wait 3 weeks after this game comes out and buy dungeon siege 3. i hope it'll be good cuz im putting my trust in DS3 as well