Mongoose Publishing is a prolific British manufacturer of role-playing, miniatures, and card games, actively publishing material since 2001. Its licenses include products based on the popular science fiction properties Babylon 5, Judge Dredd, and Starship Troopers, as well as the fantasy title Conan the Barbarian.
Mongoose was to gain a reputation for being 'predatory' and targeting other publisher's release schedules by producing similar books at the same time. However, Mongoose later denied any malicious intent, and said that with nearly 100 D20 publishers all producing books at the same time, such clashes were inevitable.
Later, as the company's fortunes solidified, Mongoose began an aggressive pursuit of licensed properties, acquiring the rights to the popular British comic series Sláine and Judge Dredd in 2002 and the landmark television series Babylon 5 in 2003.
2003 also saw the release of the magazine Signs and Portents, a house organ aimed at supplementing and supporting Mongoose's growing range of products, as well as a range of generic standalone products based on the d20 System, collectively known as the "OGL series". Further acquisitions followed in 2004, including the rights to a roleplaying game based on Conan the Barbarian, the defunct roleplaying game Paranoia, and a joint venture with popular d20 System portal EN World, the EN World Gamer quarterly magazine. Signs & Portents was turned into an online magazine after two years, which saw its popularity increase to over 50,000 downloads a month. Signs & Portents
As of 2007, Mongoose Publishing has released roleplaying and miniatures games based on the Starship Troopers license, as well as the rights to RuneQuest and Traveller, and other out-of-print roleplaying game.
In 2008 Mongoose announced that it was ceasing production and marketing of its miniatures ranges and would, for the time being, concentrate solely on the production of RPGs and miniatures rules.
In September 2008, Matthew Sprange announced that Mongoose Publishing had "joined the Rebellion Group, becoming a sister company to Rebellion itself.