Gravity Defied - Trial Racing is described as '[GDTR] is a motorcycle trial racing game bringing realistic physics to the mobile platform. The objective of the game is to race as quickly as possibly through the obstacle-ridden courses'. There are eight games similar to Gravity Defied - Trial Racing for a variety of platforms, including Online / Web-based, Windows, Linux, Mac and Android. The best alternative is XMoto, which is both free and Open Source. Other Gravity Defied - Trial Racing like games are Trials Frontier (Free), Happy Wheels (Freemium), Trials 2 (Freemium) and Free Rider HD (Free).
X-Moto is a challenging 2D motocross platform game, where physics plays an all important role in the gameplay. You need to control your bike to its limits, if you want to have a chance to finish the most difficult challenges.
Happy Wheels is a ragdoll physics-based, browser game created by Jim Bonacci. The game features several playable characters who use different, sometimes atypical vehicles to traverse the game's levels.
Ultimate Stunt champ is an extreme bike racing game for free. Your task is to ride the bike through the challenging tracks and reach the destination. Collect the stars and perform stunts to make a high-score. A very entertaining bike racing game for gamers.
Bike Mania 2 is very much the same as Bike Mania 1 but it has different courses and is a little bit harder to play in my opinion. This is great if you liked Bike Mania 1 because it will give you veterans exactly what you want.
Guts and Glory is the craziest game show on earth, where ordinary people compete in extraordinary challenges of life and death, for glory! The objective is simple: Race to the finish line while everything tries to kill you.