Contra 4 for Nintendo DS - Just $19.99!
 

Set after the events of Contra III: Alien Wars, the game follows mercenaries Bill Rizer and Lance Bean as they battle to save the world from a new extraterrestrial threat. There is single-player or 2 player co-op mode. Make sure it's you pick "Add to Cart" under "Amazon" in the right. CONTRA 4 NINTENDO DS GAME SALE