Army headquarters in secret research facility has been pouring out zombies and aliens into the ground.
Remove the endless influx of zombies and aliens.
You can remove the more zombies and aliens to upgrade.
Upgraded
1. turret gun
The increased rate of fire per second.
( I recommend you gather money to upgrade first. )
2. HP
The turret will increase stamina.
3. magazine
Can be equipped with more 'special bullet' item.
4. Special Bullet
It gives more damage.
5. bombing
You can remove all the zombies and aliens on the field at once.
9Apps 4.9
