Muse Games, a growing portal for browser-based 3D gaming, has recently announced the launch of “Immunity,” an indie game development challenge based on the Unity 3D engine. Contestants can submit a simple game prototype to be voted on by the development community and general public, and ultimately compete for a $10,000 contract to finish the game for distribution on the official Muse Games webiste and beyond.

Both professional and non-professional individuals, or teams, are being asked to submit simple Unity-based prototypes demoing their game concept. Voting participants will then be able to play the game and judge its primary mechanic. The top 5 concepts will be granted “immunity” and evaluated by the Muse team. Submission will take place between 8/25 and 10/15, with the $10,000 grand prize winner being announced at the UNITE Unity 3D development conference in San Francisco, Oct 27-30. Participants and spectators will be able to track the progression of the winning game concept to completion on the Muse Games blog.

“As Indie developers ourselves, we believe strongly in the Indie community and want to reward developers for making great games,” says Co-Founder Austin Lane. “Hopefully we can make this model a successful one for the future, and ultimately raise the stakes on browser-based indie development.”

Full contest details and a sample concept can found here.