Kane & Lynch 2: Dog Days is an action-packed game where Kane is on his way to execution with another prisoner named Lynch. Their transport is attacked by a group of men, revealing that the attackers are Kane's old associates thought to be dead. To force Kane to give them their money from their last coup, they take his family hostage and hire Lynch as his watchdog. From the moment the transport is hit, you control Kane as he tries to free his family. The camera moves behind Kane while playing and allows for a over-the-shoulder view while firing. Kane will automatically take cover where possible, but if wounded too badly, he needs a teammate's adrenaline shot to recover.
The gameplay involves shooting your way through hordes of police and special forces. You can carry two types of weapons, from pistols to assault rifles and shotguns, to deal with the enemies.
You can also give Lynch commands like focusing his fire on one enemy, trading weapons with him, and getting ammo when needed. During the game, you're sometimes accompanied by other members of the organisation, with whom you can interact in the same way as with Lynch.
The game features an offline co-op mode where the second player takes control of Lynch. The online multiplayer mode is called "Fragile Alliance," where players need to rob a bank together. However, you can attack at any time, kill your teammates, and take their collected money, marking yourself as a traitor.