Turret vs Aliens

Army headquarters in secret research facility has been pouring out aliens into the ground.

Remove the endless influx of aliens.

You can remove the more 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 aliens on the field at once.