Microsoft have announced today's Games on Demand offers (apparently these will only last today) and it features four Assassin's Creed titles that are 50% off. The UK prices don't exactly correspond to the ones in America (namely it is Revelations that is more expensive over there instead of Brotherhood - but well, these are the prices listed for the UK):
Assassin's Creed £8.99
Assassin's Creed II £8.99
Assassin's Creed: Brotherhood £11.99
Assassin's Creed: Revelations £8.99
As good a time as any to catch up on what Altaïr and Ezio were up to.