THE MISSION can be played by 2-4 players. Default controls are set up for 2 players.
You can modify these configurations, as well as setting up a 3rd and 4th player, by following the instructions below.
From the title screen, select Options:
Then select Controls:
This is the controls screen:
You can choose a player for which to change a button assignment, then choose the action, and then assign a button to it. This can be a keyboard button, a joypad button, or a joypad axis direction.
If the specific button is already assigned, you won't be able to use it! The game will show you this, and let you assign another button to the action.
After you assign a button to an action, if the next action down the list is missing a button assignment, then the game will hop down to let you assign a button to that action. This allows you to quickly and conveniently set up a player.
If you are playing with gamepads, this is the setup I recommend: