Rockstar Games has grown its stable of studios further with the acquisition of Mad Doc Software.

Massachusetts-based Mad Doc recently worked on the 360 port of Bully: The Scholarship Edition for Rockstar. The studio was established in 1999, by Dr Ian Lane Davis - the studio previously developed the likes of Star Trek: Legacy and Empire Earth II.

Mad Doc has a particular focus on AI and networking technologies and its proprietary Mad3D Game Engine and Mad AI middleware haas been available for licensing. In a statement about the acquisition, Rockstar singled out the firm's technical expertise as a key motivation for the purchase.