Square Enix has released three add-ons for Kane & Lynch 2: Dog Days.
The most expensive is the inventively named Doggie Bag Pack, which costs 560 Microsoft Points on Xbox 360 or 5.99 on PC and PS3 (also $5.99 in the US, cheekily). Look inside and you'll find two new maps (plus a pre-order map), five new weapons and new Achievements.
Next, the Alliance Weapons Pack (240 MSP/2.99) will boost your arsenal with seven of the pre-order weapons: a mixture of handguns and shotguns and assault rifles.
Finally, the Multiplayer Mask Pack has new masks and so is obviously the best. This costs 160 MSP/1.99.