According to its official PlayStation listing, Invisible, Inc. will hit the PS4 on April 19. It's been a long time coming, as it was originally released on PC in May of 2015. This version is basically a straight port, but it will also include the Contingency Plan DLC, which goes for $4.99.
It's unknown if this series will ever get a follow-up, and developer Klei is currently hard at work with Don't Starve: Shipwrecked.
Invisible, Inc. [PlayStation]