1) 21 storyline chapters that tell the story of our war with "us" from parallel worlds, with over 50 hours of experience in the storyline mode
2) Building a powerful firepower defense network in 21 3D scenes with different terrains to resist the enemy's crazy attacks
3) 3 game modes to choose from, each full score clearance will have challenges
4) 8 different types of firepower towers, 4 different types of firepower support, as well as 15 enemy ground vehicles and 5 types of aircraft.
5) Resist attacks from over 3000 enemy vehicles and aircraft in one level, and enjoy the thrill of elimination in intense combat games to the fullest
