Bonelab is available now on PC, Oculus, Vive, and Daydream. You can purchase the game on various digital storefronts, including Steam, GOG, and the Oculus Store.
If you actually own the game and need help getting Patch 3 for free (as in, downloading the official update at no extra cost): bonelab patch 3 free
Bonelab Patch 3 is a significant update that aims to tackle some of the most pressing issues in the game, while also introducing new features and improvements. According to the patch notes, the update includes: Bonelab is available now on PC, Oculus, Vive, and Daydream