Contra 4 takes place two years after the events of Contra III: The Alien Wars. After saving earth from invasion by Red Falcon, Bill Rizer and Lance Bean are confronted with a new extraterrestrial menace: the terrifying Black Viper. Joined by hard-boiled mercenaries Mad Dog and Scorpion, the warriors must once again wage war against an entire army of invaders. Refining the 2D side-scrolling genre the series established 20 years ago, Contra 4 delivers pure action at a fever pitch as players jump, shoot, and dodge oncoming hazards. Utilizing a new dual screen presentation, the action spans both screens of the Nintendo DS, giving players the opportunity to battle across expansive environments in which death can come from any direction. The use of both screens for the game's core action also allows for massive boss battles as players try to seek and destroy the weak points of sky-high enemies. ESRB Rating: Teen