In December 2008, a Kotaku article stated that Sega had announced that an Aliens vs. Predator video game was being developed. This meant that Sega's other game, Aliens: Colonial Marines, would be pushed back so Aliens vs. Predator could be released first.
Despite its mixed critical reception, Aliens vs. Predator debuted at number one on the UK all formats chart. It is currently the fastest-selling game of 2010 in the UK, a record previously held by BioShock 2. It was also the best-selling game on Steam, as well as on the retail PC charts.
SEGA and Rebellion refused to create a censored version of this game, especially after disputes with Germany and Australia. In Germany, the game was not given a rating because of the game's content and therefore was not released there at all. Australia on the other hand relented and granted this game a MA15+, which, until the introduction of the R18+ in 2013, was the highest possible rating the Australian Classification Board could give.