Top billing has been given to partnerships with Electronic Arts and Warner Bros Interactive, which will offer games through Uplay including Crysis 3, Dead Space 3 and Batman: Arkham City.
Over 13 other studios have also agreed to distribute their games through Uplay, including TellTale's The Walking Dead, Arma 2: Complete Collection from Bohemia Interactive, Crusader Kings 2 from Paradox and To the Moon from Freebird Games.
To encourage users to start buying more games through Uplay, Ubisoft is offering a free game with any purchase of £16.99 ($19.90) or more from today through March 4.
Users can pick their free game of choice from between Driver: San Francisco Deluxe Edition, From Dust, Might & Magic Heroes VI Deluxe Edition, Rayman Origins, The Settlers 7 Gold Edition or World in Conflict: Complete Edition.
Ubisoft also announced that it will start distributing its own games through the Origin online service, with titles like Far Cry 3 and Assassin's Creed 3 now available through EA's store.
Ubisoft launched its Uplay game store last year as a download portal and shop for the publisher's PC games.