The latest trailer for upcoming co-op shooter from Visceral Games, Army of Two: The Devil's Cartel, demonstrates what happens when two players engage the Overkill mechanic.
Players fill up the Overkill gauge as they shoot their way through a level. Once the gauge is full, Overkill kicks in for a period of time, where the player becomes invincible and weapons have the ability to blow up buildings and other structures.
Double Overkill engages when two co-op players fill their Overkill gauge, which awards greater kill multipliers and kill combos, and doubles the explosions.
Army of Two: The Devil's Cartel is set for a March 26 release on Xbox 360 and PlayStation 3.