Co-op is always fun. It's even more fun when it's customizable.
SOCOM 4: U.S. Navy SEALs is set to launch on April 19 and "in addition to its cinematic single-player campaign and highly addictive online competitive multiplayer," there's the enticing cooperative option, as explained at the PlayStation Blog : up to five people can play through several missions designed specifically for co-op. There are two main game types; Takedown and Espionage and before each mission starts, you can adjust "both the overall difficulty and the density of the enemy soldiers positioned on the map." Teamwork will be required at all times, which isn't surprising. But Zipper Interactive knows multiplayer of all types (check out MAG if you aren't convinced) and this addition of custom co-op missions is great for the fans. Online shooter competition is always steep but SOCOM is a franchise that has been known to hold its own.
Also, don't forget that SOCOM 4 will be compatible with PlayStation Move. Maybe you should test it out with Killzone 3 first, though…
Related Game(s): SOCOM 4