UPlay members will also get access to the test on PS3.
The beta's set to run from September 3rd right through until September 11th, and will offer access to nine characters: Sentinel, Vanguard, Guardian, Vizier, Thespian, Deacon, Bombardier, Trickster and Champion. The beta will feature three maps: Knights Hospital, Antioch, and Constantinople. Playable modes will include Deathmatch, Artifact Assault, Wanted and Manhunt.
There's no word on when (or indeed if) the beta will go public.
In the meantime, Ubisoft's released a trailer offering a chronological wrap-up of the Assassin's Creed franchise thus far. Watch if after the jump.