Only compatible with the Steam version of the Ubisoft Montreal game, the "Fortunes Pack" adds three new weapons--a silenced shotgun, sawed-off shotgun, and crossbow--two new vehicles and five new multiplayer maps to the open-world shooter.

The pack initially hit PlayStation 3 and Xbox 360 last winter for $10. While it carried the same weapon and vehicle add-ons, the consoles only got four multiplayer maps.