From Strategyinformer.com: "In my review for the original All Zombies Must Die! I remarked that the twin stick shooter had been built on the foundations of the developer's previous game, Burn Zombie Burn.
Sadly, I can't say the same for the relationship between the first AZMD and its sequel All Zombies Must Die! Scorepocalypse. Why? Because it's almost the exact same game."