Founded in 1992, the company developed multiple edutainment franchises, most prominently Putt-Putt, Freddi Fish, Pajama Sam, Spy Fox, and Backyard Sports, which, combined, sold over 15 million copies and earned more than 400 awards of excellence.

[2] GT sold the Humongous business to its parent company, Infogrames (later renamed Atari SA), in August 2005 and laid off the studio's employees.

[9] In November 1997, Humongous Entertainment signed a five-year worldwide deal with Nickelodeon to develop games based on the Nick Jr. series, Blue's Clues, making it the first and only time that Humongous has developed games based on a licensed character as opposed to its original characters.

In 2000, Humongous Entertainment released a One-Stop Fun Shop activity center game for each Junior Adventure series, with the exception of Spy Fox.

In August 2005, facing financial struggles, Atari, Inc. sold the Humongous Entertainment business to Infogrames for shares worth US$10.3 million.

[13] In October 2005, Infogrames announced plans to relaunch the Humongous brand, beginning with new entries in the Backyard Sports franchise and followed up with a business strategy for reviving characters from the Junior Adventure series.

[18] In August, Majesco Entertainment published Wii ports of three Humongous titles: the first installments of each Junior Adventure series, except Putt-Putt.

[22] Beginning in November 2011, in collaboration with Nimbus Games, Atari began releasing Android and iOS ports of several Humongous Entertainment Junior Adventure titles.