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In 2222 AD, only 5% of humanity survived the alien invasion.
The aliens have begun their final attack.
Defeat the aliens by firing the guns of the KPO9, humanity’s strongest surface-to-air weapon.
Intercepting enemies gives you EXP, which you can use to upgrade your weapon.
The fully automatic missile pods that help you attack can also be upgraded.
The future of humanity lies in your hands.