URL : http://www.flashgame-girl.com/Classic/Varth-Operation-Thunderstorm.html
Game description :
Shoot all your enemies with your awesome weapons in this great shoot em up game. Have fun and good luck!
Game controls :
Player 1 - WASD - Move.
J/K - Shoot.
Player 2 - Arrow Keys - Move.
Ins/Del - Shoot.