Rack v1.0.2 by Fek - Adult Sex Game

Rack is a science-themed bondage game where you can perform sexual tests and experiments using a variety of toys and gadgets. As you play the game, you'll unlock new features, lab settings, and test subjects to play with.

The game features a massive variety of test subjects of all genders and species, including human characters. It also supports custom character importing, which means there are lots of user-created characters available.​