The first versions ran terribly slowly until one of the programmers figured out a way to fake the whole calculation."[1] This led to the first use of advanced ragdoll physics in a video game.[7] This physics system caught the eyes of British publisher Eidos Interactive, and especially staff member Jonas Eneroth, who thought that the system could greatly benefit Codename 47's gameplay.[7] Following six months of negotiations, a publishing deal was signed between IO Interactive and Eidos Interactive.[8] Eneroth became executive producer on the project.[7]