Full list of all 56 Assassin's Creed Syndicate achievements worth 1,300 gamerscore.
The base game contains 49 achievements worth 1,000 Gamerscore, and there is 1 DLC packs containing 7 achievements worth 300 Gamerscore.
Perform 30 complete Brutal Takedowns.
Kill a Brute while he calms down his panicked allies.
Scare an enemy and make him kill someone else by mistake.
Frighten 200 enemies.
Unlock 50% of the skills.
Achieve 100% synchronization in the DLC.