The various sales are coming in thick and fast this time of the year and this time it's Ubisoft who are having a fire sale on Steam on their catalogue with most titles having 35% off. The odd title is 75% off or 25% in the case of recent releases Might & Magic X: Legacy.
You can pick up Far Cry 2 for £6.49 (35% off), Splinter Cell: Blacklist £19.49 (35% off), Assassin's Creed III £9.74 (35% off), Far Cry 3: Blood Dragon £7.79 (35% off) and Rayman Legends £16.24 (35% off).
If nothing else you'd be mad not to pick up the brilliant Might & Magic: Clash of Heroes at £1.99 (75% off).