In the later version, the time travel plotline was left out because it was too complicated and it was replaced by a facility dedicated to preparing young heroes for the world outside. By collecting mini versions of the characters, called Nanos, the player can gain abilities that will help her in the final confrontation against Fuse. Once the player returns to the past, she discovers an expanded world with more characters and areas to explore. According to Dexter (now a teenager)the only way to stop the invasion and save the world is to fix the time machine and go back one year into the past and defeat Lord Fuse before Planet Fuse absorbs the world. While many Cartoon Network characters are around, many more have been killed or have gone missing since the invasion started. Fusion matter, a nasty green acid, covers the world and only this one city remains. Meanwhile, the Cartoon Network Universe is being attacked by Lord Fuse, an evil green monster who lives on the planet that is now looming in the sky and threatening to absorb earth. The time capsule crashes in the future and has to be repaired before being used again. What does this button do?' sending the player eleven years into the future instead of just ten.

Dexter's annoying sister Dee-Dee came in and messed up something with her trademark 'Ooh. When the game was first created, players were introduced to the world through a time travel experiment with Dexter and Computress from Dexter's Laboratory. The original Fusion Fall was an MMORPG for kids and teens that featured customizable avatars that could interact with well-known Cartoon Network Characters.

How to play fusionfall legacy