FusionFall

In FusionFall, the player takes control of a customized avatar. Their character is viewed from a third-person perspective with an overlaid HUD. The game has large playable environments, with travel facilitated by various warp points. There are many glitches and secrets to use in the battle against Lord Fuse and his minions. Gameplay primarily focuses on the alliance between the heroes and villains of the Cartoon Network universe, featuring characters from Cartoon Network shows both past and present. Many characters are available as guides after players complete level four of the game. Playing past level five originally required a monthly paid subscription in the form of redeemable cards that could be purchased at participating retailers. The cards were rendered obsolete after April 16, 2010, when the entirety of the game became free to play; players with unredeemed time cards were offered a refund for their unused cards.

The open beta testing began on November 14, 2008, available to anyone with an account on Cartoon Network's website. It ended on November 16, 2008. A second beta began on December 5, 2008, and ended on December 7, 2008. The third took place during the weekend of December 12, 2008, with a single-day extension on December 19. A final beta test started on December 27, 2008, and ran until January 11, 2009. All characters created before December 22, 2008, including those of the FusionFall staff, were deleted, but all made on or after December 27, 2008, were carried onto the official release.

When it was first released, FusionFall required a paid subscription for the full game, with a limited portion of the content available to free accounts. Free accounts could only play in the "future" portion of the game, which only allows players to collect four nanos and create two characters. The full game had a total of 36 nanos before the new extensions. The game now has a more than 40 nanos. To create up to four characters, players had to earn all 36 nanos during the beta testing. Players with characters that progressed into the past during the sneak peek or during a previous subscription had their characters locked until a current subscription was purchased.

Subscription plans included one-month, three-month, year-long, and family plans. The FusionFall Victory Pack Exclusive was made available for purchase when the game was released. It contained a four-month subscription, as well as a game guide, T-shirt (if bought from GameStop), and exclusive outfits and weapons for the player's character. The Victory Packs were eventually discontinued, having been replaced with one-month and three-month game card available for purchase at Target outlets.

The game was made completely free on April 19, 2010, making everything a member could have available for free.

In 2011, the game gave the player a Clockwork set (not based on Clockwork from Ben 10). It only counts for subscribers and can only be accessed with a code.

A comic prequel, co-written by Matthew Schwartz and Megas XLR co-creator George Krstic, entitled FusionFall: Worlds Collide!!, was passed out during Comic Con '07. Due to the overwhelming success of the comic, George Krstic is in talks to write a script for a FusionFall feature based on the comic to accompany the game's launch. The comic used to be available on the official website for public viewing and in PDF format for download. It covers the events leading up to the start of the game.

Occasionally on certain holidays such as Thanksgiving or Christmas, FusionFall has a small in-game celebration that usually has a special code for a holiday item, holiday scenery, exclusive items, and missions carried by special guest appearances of future cast members. Events for holidays stretch from 2 weeks to several months; some roll directly from one to the other. Other additions FusionFall now has are new Chowder, Generator Rex, Ben 10: Ultimate Alien, and Adventure Time missions, npc's, areas. A new area called the Academy was also put into the game, where the players train in preparation for the coming missions.They eventually stopped working on the game to start others such as Project Exonaut,Formula Cartoon,and Fusion Fall Heroes.The Hollo Suit used to change depending on what time of the year it is.

Many characters from throughout the Cartoon Network Universe appear as Nanos in-game, which give the player's character special powers and abilities. They are largely based on actual characters from common or older Cartoon Network shows and games.

The following voice actors have done voice work in this game, and almost every character has been voiced by the original actor from their respective television series'; many of the characters also appear in both Cartoon Network FusionFall Heroes and another game of the same story called Project Exonaut:

^a Branch Leader
^b Academy Teacher
^c The Unstable Nano can take the forms of Johnny Test, AmpFibian (from Ben 10: Ultimate Alien), and Van Kleiss (from Generator Rex)
^d The Chupacabra first appeared in the Dexter's Laboratory episode, Got your Goat as one of Dexter's creations to scare Dee Dee. It later appeared in The Grim Adventures of Billy and Mandy episode, Aren't You Chupacabra to See Me? as a monster sealed in a cursed video tape. It then appeared in The Secret Saturdays episode, Cryptid vs Cryptid as a cryptid Fiskerton had to fight.

FusionFall uses different kinds of browsers.

On March 25, 2013, Cartoon Network released a new FusionFall game called FusionFall Heroes. In this game, instead of playing an avatar players created online, Cartoon Network decided to let online players actually play different variants of their favorite Cartoon Network characters. This game takes the same place and the same time when Fuse attacks the Cartoon Network world. The first known playable characters are Finn the Human, Fionna the Human, and Marceline of Adventure Time, Dexter of Dexter's Laboratory, Mordecai and Rigby of Regular Show, Four Arms and Feedback of Ben 10, Gumball Watterson of The Amazing World of Gumball, Mojo Jojo of The Powerpuff Girls, and Johnny Bravo. In this game, there are different costumes for your characters as well as eggs that can unlock new costumes for different heroes. If you buy an egg that contains a hero costume that you already own, it gets ranked up and all of its stats get increased by one.

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