FusionFall is an MMOG set in a re-imagined Cartoon Network universe. As a kid in this world, players will team up with other players and Cartoon Network characters to defend it from an alien invasion of epic proportions. The game is a mix of all the action of a 3-D console platform game and all the customization, character development and open-ended world exploration of an MMORPG (massively multi-player online role-playing game). In addition, small, super-deformed versions of Cartoon Network characters are collected along the way and travel with players, providing powers and abilities to assist during missions.

The development of FusionFall is a first for the industry. Created through a partnership with leading Korean MMOG developer, Grigon Entertainment, the game brings Cartoon Network's beloved characters and sensibility to the fast-growing online gaming realm with an "East-meets-West" creative approach. Grigon Entertainment is best known for successfully developing and launching several online games in Asia, including Seal Online, a light-hearted role-playing game (RPG) that took the online gaming world by surprise.