Marvel OverPower is the base set of the OverPower CCG. It is published by Fleer/Skybox in 1995.
This game is released in 9-card booster, 17-card boosters, a collector's gift set (with 2 random starter decks and random boosters). There are also 6 different 55-card starter decks: Clobberin' Time, Deadly Foes, Heroes Assemble, Lethal Allies, Mutants Unite and Sworn to Protect.
There are many different booster pack designs: Wolverine, Spider-Man, Captain America, Hulk, Iron Man, Magneto, Apocalypse, Venom, Cable, Mister Fantastic, Invisible Woman, Mystique, Elektra, Psylocke and Human Torch.