Ubisoft's ManiaPlanet services - a system for content creation and sharing developed by Nadeo for the first Trackmania game - have finally come to Steam. Ongoing open betas for Trackmania 2: Stadium and ShootMania Storm can be accessed through Steam starting today - pre-ordering either will net Steam users an extra ten percent off the asking price.

Shootmania Storm is Ubisoft's eSports entry, an arena-style multiplayer shooter slated to officially launch on April 10. The beta has garnered more than 20,000 player-created maps and over 15 player-created game modes. Trackmania 2: Stadium re-introduces the stadium environment seen in Trackmania Nations to Nadeo's sequel and is slated to launch in "early 2013."