The developers of Red Dead Redemption have challenged all shooters out there to some online multiplayer! Play the game with the developers from May 18th to June 1st for a chance to kill a RockStar and earn the in-game trophy /achievement called "Red Dead RockStar" that will go viral, much like the "Let Sleeping RockStars Lie" Achievement/Trophy in Grand Theft Auto IV. Gamers will even be entered into a contest to have their likeness featured in the game as a playable character via downloadable content if they earn the trophy and sign up for RockStar's Social Club. Continue on for the PSN and Xbox Live gamer tags to be look out for!

Point, aim and fire if you see the following Gamertags/IDs:

PlayStation Network IDs for 'Kill A Rockstar'

RedDeadDev1, RedDeadDev2

Xbox LIVE Gamertags for 'Kill A Rockstar'

RedDeadDev1, RedDeadDev2

PlayStation Network IDs for 'Play with Rockstar San Diego'

RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev_18

Xbox LIVE Gamertags for 'Play with Rockstar San Diego'

RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev18

PlayStation Network IDs for 'Rockstar Social Club Multiplayer Event'

RedDeadDev3, RedDeadDev4, RedDeadDev5, RedDeadDev6, RedDeadDev7, RedDeadDev_8, RedDeadDev9, RedDeadDev10, RedDeadDev11, RedDeadDev12, RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev_18

Xbox LIVE Gamertags for 'Rockstar Social Club Multiplayer Event'

RedDeadDev3, RedDeadDev4, RedDeadDev5, RedDeadDev6, RedDeadDev7, RedDeadDev8, RedDeadDev9, RedDeadDev10, RedDeadDev11, RedDeadDev12, RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev18

PlayStation Network IDs for 'Rockstar Posse Challenge'

RedDeadDev19, RedDeadDev20, RedDeadDev21, RedDeadDev22, RedDeadDev23, RedDeadDev24, RedDeadDev25, RedDeadDev26

Xbox LIVE Gamertags for 'Rockstar Posse Challenge'

RedDeadDev19, RedDeadDev20, RedDeadDev21, RedDeadDev22, RedDeadDev23, RedDeadDev24, RedDeadDev25, RedDeadDev26

Point, aim and fire if you see the following Gamertags/IDs:

PlayStation Network IDs for 'Kill A Rockstar' RedDeadDev1, RedDeadDev2

Xbox LIVE Gamertags for 'Kill A Rockstar' RedDeadDev1, RedDeadDev2

PlayStation Network IDs for 'Play with Rockstar San Diego'

RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev_18

Xbox LIVE Gamertags for 'Play with Rockstar San Diego'

RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev18

PlayStation Network IDs for 'Rockstar Social Club Multiplayer Event' RedDeadDev3, RedDeadDev4, RedDeadDev5, RedDeadDev6, RedDeadDev7, RedDeadDev_8, RedDeadDev9, RedDeadDev10, RedDeadDev11, RedDeadDev12, RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev_18

Xbox LIVE Gamertags for 'Rockstar Social Club Multiplayer Event' RedDeadDev3, RedDeadDev4, RedDeadDev5, RedDeadDev6, RedDeadDev7, RedDeadDev8, RedDeadDev9, RedDeadDev10, RedDeadDev11, RedDeadDev12, RedDeadDev13, RedDeadDev14, RedDeadDev15, RedDeadDev16, RedDeadDev17, RedDeadDev18

PlayStation Network IDs for 'Rockstar Posse Challenge' RedDeadDev19, RedDeadDev20, RedDeadDev21, RedDeadDev22, RedDeadDev23, RedDeadDev24, RedDeadDev25, RedDeadDev26

Xbox LIVE Gamertags for 'Rockstar Posse Challenge' RedDeadDev19, RedDeadDev20, RedDeadDev21, RedDeadDev22, RedDeadDev23, RedDeadDev24, RedDeadDev25, RedDeadDev26