Enter the following on the character select screen.

Code	Effect
Down, Right, Down, Up, Right, Down, Left, Down, Up, Right, Up	Supervisor
Left, Right, Down, Left, Up, Left, Down, Left, Down	Mayhem
Right, Right, Right, Up, Up, Down, Left, Left, Down, Down	Vitriol
Right, Up, Up, Right, Down, Right, Up, Up	Assault
Up, Right, Down, Right, Right, Up, Left, Up	Anil 8