Developer RedLynx has revealed that its popular Xbox Live Arcade title, Trials HD, has just passed the one million sales mark. Pretty impressive given that it’s only been a little over a year since the game was released.

This sales mark doesn’t include sales of the first expansion pack, Trials HD - Big Pack, but only sales of the game through Xbox Live Arcade. The second expansion pack for the game, Trials HD – Big Thrills, will deliver 40 new tracks including 10 tracks created by fans who recently competed in the Track Creator Challenge. It is scheduled to be released in the fourth quarter of this year.

Of course RedLynx is as pleased as punch about the sales:

“Only a handful of downloadable console games have reached this plateau,” said Tero Virtala, CEO of RedLynx. “For a company of about thirty-five people, it’s a significant achievement, and it validates our strategy of focusing on online and downloadable games that have the potential to evolve into long-term, successful game franchises.”

“This is a satisfying milestone,” said Antti Ilvessuo, Creative Director and co-founder of RedLynx, as well as the lead designer on Trials HD. “But it’s just the beginning. With the Big Thrills DLC, we are including ten of the very best user-created tracks right alongside our own.”

He sighed, and donned a long judge’s robe and powdered wig, then picked up a gavel. “Thousands of tracks were entered into the competition,” he said. “For the next few weeks, I shall be a very busy, track-judging man.”

And Microsoft also had a couple of words to add to the mix:

“Congratulations to RedLynx for creating such a beloved, fun game that powerfully showcases the Arcade experience,” said Scott Austin, Director of Digitally Distributed Games at Microsoft. “We look forward to bringing more Trials HD content to the Xbox LIVE community with the upcoming release of Big Thrills.”

If you haven’t yet played Trials HD read our review to see what kind of tricky fun you’ve been missing.