> I never buy Unity/Unreal games or non-multiplayer games.

Well, of course that's a valid approach, but you do realize that most people playing games don't really care which engine something is developed in?

Even if this personal requirement of yours is true or not, "Not a single game is custom made for VR" couldn't be further from the truth, and the mainstream does not have anything close to those requirements. They simple buy and play games that look fun, regardless of engine.