Rebellion Developments Limited is a British video game developer based in Oxford. Founded by Jason and Chris Kingsley in December 1992, the company is best known for Sniper Elite and multiple games in the Alien vs. Predator series. Sister company Rebellion Publishing has published comic books since 2000, when it purchased 2000 AD, the publisher of characters such as Judge Dredd and Rogue Trooper. In the 2010s the studio saw growth and success with their Sniper Elite series of games. The series has spanned 5 mainline installments and multiple spin-offs, including the Sniper Elite: Nazi Zombie Army entries. Their latest title, Atomfall, was released on March 27, 2025.

Rebellion was founded on 4 December 1992 by brothers Jason and Chris Kingsley in Oxford, England. The pair had just finished academic degrees at the University of Oxford, and had ambitions of starting doctorates. In their spare time, they did freelance work in the games industry. When their freelance jobs roles began to expand and they were taking on more management responsibilities, they decided to establish Rebellion in Oxford. The foundation of the studio was laid when the brothers secured a deal with video game publisher Atari UK. They presented a 3D dragon flight game demo to directors at the publisher, who were seeking games for the upcoming Atari Jaguar system. They were commissioned by Atari to work on two titles for the Jaguar, Checkered Flag and Alien vs Predator, which both released in 1994. The development team was expanded to assist with work on these games. It included artists Stuart Wilson, Toby Banfield, and Justin Rae, along with programmers Mike Beaton, Rob Dibley, and Andrew Whittaker. Following Alien vs Predator, Rebellion saw no releases for some years, with their next project, the intentionally light-hearted PC game Mr. Tank, going unpublished.

Over the course of the decade, Rebellion underwent rapid expansion with numerous acquisitions of other studios and properties. This wave of expansions included the purchase of 2000 AD from Fleetway Publications, which began Rebellion's first foray into comic books. In addition to further publications under the label, Rebellion began to develop associated characters for the games market. In 2003 Rebellion released the game Judge Dredd: Dredd vs. Death.

In 2004, Rebellion entered a deal with DC Comics to reprint several 2000 AD stories in trade paperback form, including Judge Dredd, Strontium Dog, Nikolai Dante, and Sinister Dexter. When DC left the venture, citing poor sales, Rebellion created its own line of American graphic novels that were distributed through Simon & Schuster. In 2005 Rebellion also created the series Judge Dredd: The Complete Case Files, which has begun reprinting almost every appearance of Judge Dredd in chronological order.

Rebellion's 2005 game Sniper Elite was awarded "Best PC/Console Game" in the TIGA Awards of 2005. Following the release, Rebellion acquired numerous games studios and properties. This began in 2006 with the purchase of Tomb Raider developers Core Design from Eidos Interactive, as well as Strangelite from Empire Interactive, and Elixir Studios' former IPs including Evil Genius and Republic: The Revolution. The acquisitions made Rebellion the largest independent game developer in Europe.

Acquisitions later in the decade were predominantly associated with the growing publishing wing of the company, including Blackfish Publishing and Mongoose Publishing in 2008, followed by Cubicle 7 and Solaris Books in 2009. On 14 July 2009, the company purchased the Ground Control, Empire Earth, Lords of Magic and Lords of the Realm franchises from Activision. These were ex-Sierra Entertainment properties that the company offloaded due to their new long-term strategy following the Vivendi Games merger.

In 2009, Rebellion's Rogue Warrior game received poor reviews. This was followed by Aliens vs. Predator in 2010, published by Sega, which received a mixed critical reception, but debuted at number one on the UK all formats chart. Significant changes were made in 2010, including staff cuts at their main studio in Oxford as well as the closure of Rebellion Derby – the former Core Design studio which had only been purchased four years previously. Studio CEO Jason Kingsley discussed pivoting their focus to smaller titles in the wake of the changes. The move coincided with the end of a property lease. Kingsley commented that "growth is sometimes painful, never more so than in the current climate and we have had to take a long hard look at how we operate our studio network. Strategically we have decided to review the need for the Derby facilities."

Following the closure of the Derby studio, the company was accused by laid off employees and their spouses of withholding wages and severance pay. The studio was further accused of not paying legal fees for staff members who sought "legal help during the redundancy consultation period".