Mainly as a learning experience to understand how Red Barrels made Outlast. I’d also modify the engine to make it more compatible with the current generation of software. I have some experience with modifying old versions of Unity, and I wanted a bigger challenge. Also, I wouldn’t consider Unreal Engine 3 ancient, it was made only 7 years ago and a lot of success has come from using (ex. BioShock, Outlast, etc.)