Hunter Steven needs to hunt down all the monsters. Take your weapon and hunt down all the monsters. Be careful, some monsters are stronger, and its harder to kill them. But, of course, you can buy a more powerful weapon and kill them all. Go to the store, get a stronger weapon, and hunt down all the monsters.
To move, use the WASD keys. To fire, use the Mouse left-click. Kill all the zombies and complete the missions.