If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Diepix Arena 2 is an awesome fast paced shooter. Fight against 50 waves of enemies using a powerful tank that can be upgraded in 6 ways and can use 8 power ups. There are 16 types of enemies to defeat, 5 arenas to visit, 5 bosses to beat and 42 achievements to get.
WASD – Move.
Mouse – Aim and shoot.
123/ZXC – Power up hot keys.