You must keep the human slave population on Prison Planet from escaping. Human slaves are needed for a grand purpose, so killing them is not an option. This is a single player tower defense web game. Place guards to knock out prisoners before they reach the exit. Prisoners are worth more points if you knock them out early. Try to stun them as they run out the door to get a higher score. Have Fun!
Your screen is to small to play this free online game.
Use mouse to play this fun web game. Hammerheads, Cgeetas and Foxes and can be placed only on guard tiles. Robot dogs can only be placed on prisoner tiles. You can upgrade guards by clicking on them any time. Upgraded guards do more damage, have increased range, or perform special attacks. Tech Guys are immune to slow effects while their shield is in place make sure you have enough Hammerheads to complete the level.