If you are looking for a free version of (2017) or the original 2006 game, it is important to distinguish between legitimate offers and high-risk "free download" sites. Current Status of "Free" Downloads
Prey has been featured as a "Free Game of the Week" on the Epic Games Store in the past. It is worth checking their weekly rotations to see if it returns. prey-free-download-pc-game-full-version
If you prefer owning your games without digital rights management, GOG.com frequently hosts sales for the digital deluxe version. Game Overview & System Requirements If you are looking for a free version