If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Days 2 Die
Your mission in this cool shooting online zomie game is to defend yourself and fight off the waves of zombies in five different maps! Build barricades to protect you and your friends and hire mercenaries to help you survive. You can purchase over 20+ weapons, including - grenades, katana swords and automatic weapons. Lots of fun!