Reddit user AlphaNumeralBeta, a verified Assassins Creed Unity Tester, has posted a screenshot from the upcoming game. He writes, "What you are seeing is the structured campaign level list. Each level affords a different location such as Ireland during the Great Famine. Each level then has its own assassin for the area. The levels are wholly coopable from the investigation, to the assassination, to the side missions/diversions.
Players can either join free roam and accompany you into missions, or you can start a mission via matchmaking".
Update The user AlphaNumeralBeta, who leaked all the info, has deleted his account.