Already stats are being big brothered over on the official Ubisoft community website. The top scoring players for each platform will receive a free Season Pass for all DLC.
The timing couldn't be better as this week Assassin's Creed 3 releases on PC, finally, in the US and Europe. 'Leave No Witnesses' is one of several singe player events planned.
To participate in the event you need to. Replaying memories if you've already completed the game does count for the event, so you won't need to restart your entire campaign. Multiplayer events are also rolling out as online matches have become an evermore serious focus for the AC development teams.
Assassin's Creed 3 releases on PC November 23rd in Europe.