Liam O'Brien is an Assassin who appears in Assassin's Creed: Rogue. He was born to Irish immigrants, and lived a rough live growing up until he met Achilles and joined the Colonial Brotherhood. Liam is an excellent marksman, and very skilled in combat. Liam is also good at sailing, and if he isn't shooting or cleaning his weapons, he can usually be found on his ship. He is also extremely dedicated to the Creed, and will not tolerate anyone speaking against it.