Civilian: You only need to be cover and to be alive.
Trooper: You need to kill enemys and protect civilians.
Boss: You are big and with high HP. You are slow and need to kill civilians and enemys, you can pick weapons and punch enemys with fist.(no sword)
Test subject: Same as Civilian. But he is with an rope on hes back with hes hands, very slow and able to kick.
Anti-personal trooper: Same as Trooper, but with slow speed and high defense.