Cross the collapsing Grapple Bridge

Acquire the Head of Euryale

Acquire the Golden Fleece

Whip the Steeds of Time

Kill the Colossus of Rhodes, the Dark Rider, and Theseus

Acquire Typhon's Bane

Defeat the Dark Rider for the first time

Enter the Animus 2.0.

Be reborn as Ezio Auditore Da Firenze.

You killed a Rockstar in multiplayer.

Get hand picked for Shepherd's elite squad.

Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.

Use the environment against an enemy.