In Fusion, Samus’ suit is fused with a metroid, making for some very intresting gameplay. Fusion plays very much like a classic Metroid title. There is one significant change though. Due to the fusion with the metroid, Samus must actaully absorb enemies to gain energy. Enemies are creatures infested with some kind of viral organisim called “X.” When baddies are killed the X virus flys out and zips around the screen. If Samus touches the virus she gains energy or missiles and probably other powerups too. This adds quite a twist on the gameplay because if Samus doesn’t absorb the X virus it will re-infest a host and you’ll have to take out the host again.