Pivot Points are special Collectibles that unlock once you successfully beat the Main Story, Pivot points unlock "cheats" in the Animus. Cheats can be accessed by pressing (Start -> Options -> Scroll Down to Animus Hack)

Unlockable	How to unlock
Infinite Ammo	Collect Pivot - "Epsilon".
Killing Spree (Possible to assassinate enemies during open combat)	Collect Pivot - "Theta".
Made of Steel (Unlimited health)	Collect Pivot - "Iota".
Ninja (Guard detection and investigation is turned off)	Collect Pivot - "Lambda".
Recruit (Infinite Recruit Tokens)	Collect Pivot - "Omicron".
Season Changer (Ability to switch between summer and winter)	Collect Pivot - "Tau".
Semi-Automatic (No reload times)	Collect Pivot - "Kappa".
Sun and Moon (Ability to set day/night)	Collect Pivot - "Eta".
Thunder Kill (Lightning strikes every time you make a kill)	Collect Pivot - "Upsilon".
Weather Man (Ability to set the weather)	Collect Pivot - "Sigma".