Operation Lovecraft: Fallen Doll

Fallen Doll: Operation Lovecraft is a full 3D game made with the Unreal Engine, with desktop and virtual reality supports. It features women and female androids being fucked by various alien monsters and human males in a decerebrate state (called dreamers). Currently, the game is only a sex simulator, but it is expected to evolve to a full game with a single and multiplayer modes in 2022.
As implied by the title, Operation Lovecraft takes its inspiration from the science fiction universe created by H. P. Lovecraft.