Dead Island: Multiplayer Gameplay 2020 (PS3) #1 (CO-OP) - YouTube
Dead Rising 2 - The Co-op Mode - YouTube
Dead Island - Wikipedia
Co-Optimus - FAQ - Dead Island: Riptide Co-Op FAQ
Deep Silver Dead Island: Riptide for Playstation 3 - Shop Deep Silver Dead Island: Riptide for Playstation 3 - Shop Deep Silver Dead Island: Riptide for Playstation 3 - Shop Deep Silver