Multiplayer games for Xbox 360 with 4-player online support

Age of Booty

Players: 4 local, 4 online

Operation Flashpoint 2: Dragon Rising

Players: 0 local, 4 online

WWE Smackdown Vs. Raw 2008

Players: 4 local, 30 online

Dungeon Siege III

Players: 2 local, 4 online

The Darkness II

Players: 0 local, 4 online

HAWX 2

Players: 0 local, 4 online

Guitar Hero: World Tour

Players: 4 local, 4 online

Skate 3

Players: 0 local, 6 online

Serious Sam 3: BFE

Players: 2 local, 4 online

Gauntlet

Players: 0 local, 4 online

Call of Duty: Black Ops 2

Players: 4 local, 4 online

X-Men

Players: 4 local, 6 online

Heavy Weapon

Players: 4 local, 4 online

Castlevania Harmony of Despair

Players: 0 local, 6 online

WWE Smackdown vs Raw 2009

Players: 3 local, 4 online

Bubble Bobble Neo

Players: 4 local, 4 online

DOOM II

Players: 4 local, 4 online

The Warriors: Street Brawl

Players: 4 local, 4 online

Alien Hominid HD

Players: 2 local, 4 online

The Fancy Pants Adventures

Players: 4 local, 4 online

Apache: Air Assault

Players: 2 local, 4 online

A World of Keflings

Players: 2 local, 4 online

The Beatles: Rock Band

Players: 6 local, 4 online

Battlefield: Bad Company 2

Players: 0 local, 4 online

Two Worlds 2

Players: 0 local, 8 online