One runner that makes extensive use of Unreal Engine visuals is T-REX dinosaur game. The game's rules are straightforward. In this game, you take control of a Tyrannosaurus Rex and race over the desert. Along your journey, you'll encounter cacti that must be jumped at the last possible moment. Loss was yours if you were unable to respond. This is the whole of the game. The sky's the limit when it comes to playing, provided you're good at jumping. You can sprint across the desert indefinitely since it is looped.