13 days after it's a new unity 3D shooting games and it's a sequel to 13 Days in Hell movie. Your mission is to survive the mass incoming waves of zombies. Use your mouse to aim and shoot and if you can shoot the zombies in the head you will kill them with one bullet. Similar to counter strike game if you head shot your enemies you will kill them with one bullet. The keys in winning the game is to aim and shoot fast and reload faster, the zombies are attacking you in small number but they are gathering so master your shooting skills and be the best shooter in the game to survive. Have fun with all the levels and enjoy our vast online collection of free online action shooting zombie games. Have fun with this new unity 3D zombies game and be the best player from 13 days after games. Good luck and have fun!