Multiplayer beat-em-up games with 2-player online support

Dungeons & Dragons: Chronicles of Mystara

Players: 4 local, 0 online

River City Ransom: Underground

Players: 4 local, 0 online

Teenage Mutant Ninja Turtles: Turtles in Time Re-Shelled

Players: 4 local, 0 online

Guardian Heroes HD

Players: 2 local, 360 online

Dead Rising 2: Off the Record

Players: 2 local, 0 online

Code of Princess

Players: 4 local, 3 online

Tekken 6

Players: 2 local, 360 online

Unbound Saga

Players: 2 local, 360 online

WWE Smackdown vs Raw 2009

Players: 4 local, 360 online

WWE Smackdown vs Raw 2009

Players: 4 local, 0 online

The Warriors: Street Brawl

Players: 4 local, 360 online

Shank 2

Players: 2 local, 360 online

Streets Of Rage 2

Players: 2 local, 360 online

Final Fight Double Impact

Players: 2 local, 360 online

The Simpsons Arcade Game

Players: 4 local, 0 online

Streets Of Rage 2

Players: 2 local, 0 online

The Simpsons Arcade Game

Players: 4 local, 360 online

Zheros

Players: 2 local, 0 online

Double Dragon IV

Players: 2 local, 0 online

Knights of Valour

Players: 4 local, 0 online

Ninjin: Clash of Carrots

Players: 2 local, 0 online

Capcom Beat 'Em Up Bundle

Players: 4 local, 0 online

Streets of Rage 4

Players: 2 local, 0 online

Clan N

Players: 4 local, 0 online

Scott Pilgrim Vs. The World: The Game Complete Edition

Players: 4 local, 0 online