Age of Speed Underworld
The planet is dying because of an asteroid that spreads a substance called Testalunium and contaminates gradually its core. You'll have to enter the heart of the earth to collect this strange matter and purify the planet. The future of humanity depends on you and your ability to control your futuristic racing car in extreme conditions you will encounter. Open your eyes and take care of your car, hitting any obstacles will be fatal and it will restart the mission. Improvements will be available for purchase to help you progress.