The Ubisoft Publisher Weekend Sale on Steam has games up to 75% off and last to February to 24th. The Ubisoft sale will have new deals daily up until the end. Steam sales always have great deals, and a lot of publishers get a boost during sales, if your looking to save some cash on Steam games head over before all the deals end.
The sale has games from big series such as Splinter Cell, Far Cry, Prince of Persia, Ghost Recon, Assassins Creed and Rainbow 6. Also PC favorites series Anno, Heroes and Might and Magic. Other fan favorites like Rayman and Beyond Good and evil are available and Indie games like From Dust and Cloudberry Kingdom.