The most daunting and tedious achievement in the game. Press and look at your animus DNA Tracker. Below is the list you can look at to make sure it's all done. There are a total of 17070 points on the tracker and you must get all of them. You pretty much have to do everything in the game!
Please visit THIS THREAD for a guide on the Club Challenges.
Sequences - Main story (Must get 100% sync in call optional objectives)
Clubs - You must get all clubs completely done (all challenges/missions)
Side Missions - This covers all liberation missions
Discovery - All almanacs, chests, feathers, trinkets, forts, underground, and citizen missions
Naval - All naval missions, privateer contracts, as well as the Captain Kidd's quest
Homestead - All characters, missions, and crafting all inventions