To use sandbox mode place 1 to 8 then enemies will spawn Turret Upgrade Info: Basic: +1 damage Double: Gives a 3rd barrel to the turret Sniper: Attacks much faster Laser: Can detect hidden Super: +3 damage Super Laser: +10 damage. I almost feel bad for the enemies Farm: Gives 100 cash at the end of every round Heavy: Attacks much faster Hitman: +1 damage and faster attack speed Ninja: Throws 3 shuriken at once Wizard: Throws fire that deals 3 damage and attacks faster and kills leads Mech: +3 damage Cannon: +3 damage and faster attack speed Boat: Second projectile +1 damage Sub: Faster reload If you beat wave 25 you beat the game cause wave 26+ are random