activation codes are rarely given away for free today outside of official hosted by Ubisoft. If you already own the game (e.g., through Steam) but are being asked for a code, it is usually a technical error that can be bypassed without needing a new key. 1. How to Get Far Cry 3 for Free Legally

Sites that ask you to "login with Ubisoft to verify your free code" are harvesting your username and password. They will drain your Ubisoft account, steal any games you own (including Far Cry 3 if you bought it), and sell the account online.