This post was published 6 years ago and the download links can be irrelevant.
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Shadow Biker v1.0 MacOSX 9MB
Shadow Biker is a physics based ragdoll motorcycle racing game. Get to the finish flag in the fastest time possible. You'll have to tackle huge ramps and jumps. You'll spend almost as much time in the air as you do on the ground, but remember you will only be able to accelerate on the ground. Lean your rider back and forth to perform amazing flips and to stick the landing. Sling mud through tons of levels and try to avoid wiping out or you'll send your rider flying through the air, bouncing off the ground and breaking bones.