The Windows edition of Outland is now available on Steam, with the OS X and Linux versions planned to launch later this year. The action/platformer carries a 15% discount for the next week. Here's a new trailer from the game showing off its co-op multiplayer support, and here's word:

Outland is a fast-paced, dynamic platformer where the player uses powers of light and dark in an epic journey to save the world from forces of chaos.

In-between Balance and Chaos stands one man, whose efforts will either bridge the ancient divide or doom the world to destruction. Outland is an ambitious 2D-platformer with a beautiful visual style and a unique, polarity-switching gameplay system. Your adventure will shift between light and darkness as you struggle to adapt in an ever-changing world!