Dirt Bike Extreme - another game made with Unity. Took about 2 months to complete.

Take part in extreme motorcycle races across the dangerous and challenging tracks. Dirt Bike Extreme is easy to pick up but hard to master. Race, jump and crash your way and other mad rivals through the amazing tracks as you master the skills and physics of motocross in this high-speed racing adventure. Conquer challenging routes on 23 different runs, discover new bikes and become the best of the best! Over 257K downloads already!

Windows Version:
https://www.gametop.com/download-free-games/dirt-bike-extreme/

Mac Version:
https://www.macstop.com/games/dirt-bike-extreme/