Multiplayer Servers for Assassin's Creed Brotherhood, Assassin's Creed Revelations and Assassin's Creed III got shutdown without previous warning. : r/assassinscreed
Multiplayer - Assassin's Creed: Brotherhood Wiki Guide - IGN
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Respecting Others' Feelings While Playing Multiplayer for Assassin's Creed: Brotherhood
Old Assassin's Creed games will stay available after 'decommissioning' | PCGamesN