In Assassin’s Creed 3 for the PC, PS3, Wii U, and Xbox 360, you can get Uplay points by first signing up for Uplay in the main menu, and then completing certain tasks in the game.
Uplay points can be used for unlocking things like alternate costumes, themes, etc.
There are a total of 100 Uplay points in Assassin’s Creed 3, and here is how you unlock them.
10 Uplay Points – Complete Sequence 2
20 Uplay Points – Complete Sequence 6
30 Uplay Points – Complete Sequence 12
40 Uplay Points – Reach Level 20 in Multiplayer mode