X-Men: Children of the Atom was the first Capcom fighting game to use Marvel characters, and it set the stage for the popular and long-running Marvel vs. Capcom series. Released at the time of the X-Men animated series, the game has much in common with mid-90s Capcom fighters Super Street Fighter II Turbo and Darkstalkers. Children of the Atom adds X-Abilities, powered by the multi-level X-Gauge, as well as air combos and super jumps. The game's storyline concerns a plan by Magneto disrupt the Earth's electromagnetic field and bring mutants into power, with other evil mutants aligning with Magneto and the X-Men teaming up to stop them. (As with most Marvel-related fighting games, it's never quite explained why the X-Men are fighting each other, but it's a great way to answer those "Who would win in a fight?" questions.)