When playing the game with your friends one person choses to be the mech (The boss) and everyone else can chose one of their favorite characters to try and beat the boss. Here are some controls: WASD to move. SHIFT + W to sprint. C or CTRL to crouch. Right click to aim. Left click to fire. R to reload. TAB to leave the game. Updated 1.0.2! Update Log: -Updated start screen UI -Major bug fixes