Monsters Vs. Aliens - Nintendo DS Fight alien robots, based on the blockbuster animated movie Play as your favorite monsters from the movie Experience different gameplay based on choice of monster Explore movie locations and game-exclusive areas Second player can drop in for co-op mode Fight alien robots, based on the blockbuster animated movie Play as your favorite monsters from the movie Experience different gameplay based on choice of monster Explore movie locations and game-exclusive areas Second player can drop in for co-op mode