Have you ever wanted to be the architect of your own zombie apocalypse? Then Zombie Army Simulator is the game for you. As ...

Launch Zombie Army Simulator on Roblox. Tap on the blue Twitter bird icon on the left-hand side of the screen. In the text box, type in a code exactly as it appears on the list up above.

Zombie Army Simulator invalid code issue (Image via Roblox) As each code has a unique expiration date, it's important to keep an eye out for updates as some can expire sooner than others.