Prison Architect Update 4d

In addition to the Update 4 features, we have also implemented some experimental new performance enhancements that should make the game run better on virtually everyone's PC. However there is a chance that some backwards compatibility has been lost as a result. We have made this build available on a branch - you will have to opt into it to try it. Please let us know if this special version works for you, and especially if it gives you problems.