Motocross Nitro will bring out your inner speed demon. Customize your bike to best suit each terrain. Challenge your oppositions in sprints, races and freestyle modes showing off your best tricks to cross the line ahead of the pack. How to add Game apps in the Chrome Browser, follow these steps: 1. Download the App file and save it to your computer. 2. Click the customize icon on the browser toolbar right side ( 3 lines ). 3. Select Tools > Extensions. 4. Locate the App file on your computer and drag the file onto the Extensions page. 5. click Install.