The physics-platformer has been the highest-selling downloadable game on the platform since its launch in August.
"It's a remarkable and proud moment for us to have Trials HD as one of the highest-ranked games among Xbox Live Arcade users, and one of the bestselling Xbox Live Arcade games this year," said RedLynx CEO Tero Virtala.
"We're a smaller, 25-person multiplatform studio, and for us this is an excellent example of how digital download space opens up significant opportunities that might not otherwise be available for creative and talented smaller teams."
The title was the penultimate release in the Summer of Arcade promotion, which also saw the release of Marvel Vs. Capcom 2 and Shadow Complex.
> Click here to read our review of Trials HD