Disney’s Lilo & Stitch 2: Hämsterviel Havoc is a platform shooter and strategy game with some kart-racing levels that is based on Lilo & Stitch: The Series, a TV show that follows the 2002 Disney film Lilo & Stitch. Hämsterviel Havoc is a sequel to the original film's 2002 Game Boy Advance tie-in game. The game allows the player to play as Hawaiian girl Lilo Pelekai and alien experiment Stitch as well as other characters from the show. The plot revolves around the title characters rescuing Jumba Jookiba's experiments (also known as Stitch's "cousins") from Dr. Jacques von Hämsterviel, and eventually defeat Hämsterviel himself.
You play action parts of the game as Stitch. These parts resemble a Metal Slug-style shooter, with double jumps and 8-directional shooting. The strategy/puzzle parts of the game are played by Lilo. These involve using other experiments to help you make your way through the level. The experiments are other characters from the show that have special abilities such as moving through electrical wires. The experiments can also be utilized by Stitch in later levels to fight enemies.