Gun Mayhem 3 features 3 modes of play namely campaign mode at gunmayhem2.co, deathmatch mode and survival mode. In the campaign mode, the player has to defeat the boss in the arenas. It is a must for the player to overcome the boss to unlock all extra characters and get to higher levels. Player can form a custom game with his teams in the deathmatch mode. In this mode, player with his teams have settings and rules and game play takes place in a combat style blood bath. When the player chooses to play in survival mode, he must defeat as many enemies as possible to get the game.
Players can use different keys for movement and action in the game as follows
Left arrow key – move left
Right arrow key – move right
Up arrow key – jump
Down arrow key – block
Z key – first attack
X – second attack
Controls for player 2 include
W – Up or jump
A – move left
S – block or down
D – move right
T – shoot
Y – throw bomb
The settings and keys for first 2 players are the same. Keys and controls for the rest of the layers or teams included can be changed by the player. Players can change the game settings and controls. And, it is easy to add another partner into the campaign and assign settings of keys.