Rebellion has acquired Ignition's Banbury-based development studio Awesome Developments.
The studio is known for its PSP project Archer Maclean's Mercury, and becomes the latest studio to join Rebellion.
The company acquired both Tomb Raider developer Core Design and Strangelight Studios, the team behind Starship Troopers, last year.
"This acquisition takes the Rebellion headcount to 280 full-time members of staff," said Jason Kingsley, CEO of Rebellion.
"We're fully booked with work until later in the year so these additional highly talented staff will be a valuable addition to the team."
Rebellion is currently working on a multiplatform title for next-generation home consoles.