Talisman: The Horus Heresy is now available on Steam for Windows and OS X, offering the latest in the growing catalogue of games based on the Warhammer 40,000 universe. Here's a gameplay trailer and here's a description of what they describe as a digital board game:

Talisman: The Horus Heresy is a digital board game based on the Talisman rule system and set in the Warhammer 40,000 universe, during the cataclysmic events of the Horus Heresy.

Up to four players will be able to take control of one or more of the galaxy’s greatest heroes or most notorious villains. Taking the side of either traitor or loyalist, these Warlords will form a vast Legion of Space Marines, battalions of tanks and battlefleets of Spacecraft.

The new combative team play will appeal to fans of Talisman and the Horus Heresy alike. It’s a unique adaptation of Talisman that has been tailored specifically for digital platforms. In Talisman: The Horus Heresy the player’s experience of Talisman is scaled up exponentially, exploring not a kingdom but a whole galaxy in the 31st Millennium. No longer will you be fighting for the Crown of Command, but for the very future of humanity…

“We’re absolutely ecstatic to release this version of Talisman to our fans. The Horus Heresy era, set 10,000 years before the main events of Warhammer 40,000, is an iconic and amazing time in the universe’s timeline. Our game allows players to take their favorite heroes (or villains) and vie for a chance to rule the galaxy.” – Nomad Games MD Donald Whiteford