John "Loose" Kannon has not only a very subtle name, but is also the leader of a special team of the narcotics division. However, his first action in the game is not very cop-like: killing a gang and collecting their drug money for his private funds. Of course this starts a violent gang war and Kannon finds himself right in the middle of it.
During the 12 levels, Kannon has to move through 12 linear levels while gunning down every enemy he sees. This is made easier when the player actives bullet time which slows down time - however, this does only work as long as there is energy left on the associated bar which fills up when killing enemies or simply by waiting. When choosing the latter option, Kannon also regenerates his life energy. Sometimes the player has to solve quick-time events, e.g. during interrogations, or mini games like fist fights or using a crane. Weapons, special ammo and body armor can be bought between levels with money which is earned with kills or micro-transactions.