Made for two to four players, the co-op missions will include such rootin' tootin' tasks as rafting down a river with your chums and yoinking gold from a mine rigged to 'splode.

Rockstar also teases future Red Dead Redemption DLC, revealing that at least two further DLC releases are planned for this summer, with details and pricing to come.

Sporting a variety of co-operative multiplayer modes as well as singleplayer and competitive play, Red Dead Redemption will ride onto Xbox 360 and PlayStation 3 on May 18 in North America then hoot and holler its way into other regions on May 21.

Details on the three missions revealed today follow below.

"Walton's Gold"
Walton's Gang have taken control of a mining camp rich with gold. Fight through the camp and load your mine cart with as much gold as you can carry and get out as fast as you can--Walton's boys have rigged the place to blow.

"The River"
Ride a raft down river, taking out rebel encampments along the way until you reach the rebel stronghold of Nosalida and a final epic battle for the town's massive weapons caches. Watch out for Gatling gun-equipped enemy rafts.

"Ammunition"
The Mexican Army has the town of Tesoro Azul under siege. Storm the gates under heavy cannon, Gatling gun and sniper fire to destroy the Mexican artillery placements.