Last week, Ubisoft announced a community challenge via Twitter, which once met would unlock the "San Donato by Night" multiplayer map in Assassin's Creed: Brotherhood
The challenge was simple, 2012 replies to @AssassinsCreed containing the phrase "Bring on the NIGHT" and the map would be unlocked.
In the last hour, the Twitter communities hard work has paid off, with the following Tweet from @AssassinsCreed:
Excellent work Assassins! We've reached 2012 tweets with "Bring on the NIGHT!" and are unlocking San Donato by Night mp map! Great job!!