Prison Architect is testing a multiplayer building mode. The surprise Update 16 for the 2015 sim from Introversion is currently in testing for the Steam version and adds co-op online multiplayer that lets budding wardens run their penitentiaries together. In the video, the developers explain that the 8-player multiplayer feature is very much an “early alpha” run and does not use the full build of the sim. Wiring and reports aren’t functional in the Steam test build, but that may change later. It’s not a “prison industrial complex” without other people in on the business.