PVO - Anti-Aircraft Defense

ENEMIES ARE APPROACHING!! INCOMING FIRE!!
Defend your base from enemy air raids! You're the lone guardian against invading hordes. Unleash your skills and safeguard your people. The enemy is closing in, but you're armed with a mighty cannon and ammo crates. Prove your dominance!
Non-stop action and intense gunfire await!
No internet connection required, no special permissions needed.