Prison Architect launches October 2015, Introversion has announced.

The PC prison sim has been in alpha for some time, but Introversion has improved the game with a raft of updates. (Paul Dean took a look at the Prison Architect alpha for Eurogamer back in February 2014.)

Alpha 35 launches today and includes an update for the gangs system that means prisoners can now trade contraband in the prison for cash. It also means protection rackets. The video, below, runs through today's announcement.

Version 1, though, comes out in October. Not long now!