Hunting the Hunter

Hunting the Hunter was a virtual representation of one of Ezio Auditore da Firenze's genetic memories, relived by Desmond Miles in 2012 through the Animus.

Description
Ezio Auditore received a contract from Lorenzo de' Medici to assassinate a marked man, in hopes of finding clues to the identity of whomever wanted Ezio dead.

Outcome
Ezio eliminated the marked target, and subsequently assassinated the bounty hunter, completing the contract.

Reference

 * Assassin's Creed II