Will include Assassin's Creed and games from the Tom Clancy series.

Assassin's Creed, Director's cut edition screenshot

Valve has announced a new partnership with Ubisoft that will see the release of over 40 Ubisoft video game titles on the Steam download service. This will include the upcoming PC version of Assassin's Creed - now available to pre-purchase - and games from the Tom Clancy series.

More titles will be added to the service over the weeks ahead, including games from the Heroes of Might & Magic series, the IL-2 Sturmovik collection, further titles from the Tom Clancy series and many more. The Ubisoft game line-up will be the largest available from any single publisher or developer on Steam.