Some other ideas to consider:
: Create a series of ultimate challenges that players can undertake once they've maxed out their characters and gear. This could include an infinite zombie wave challenge or a final boss fight against a super-zombie.
The "Crazy" part refers to the AI behavior—zombies no longer shuffle predictably. They sprint, climb, swarm, and even use rudimentary tactics. The "100 Better" part is a metric of improvement: 100% more loot variety, 100% more zombie types, and 100% more ways to die horribly.
: Unlike earlier versions, newer iterations allow you to pit iconic characters like Goku or Naruto against endless undead hordes.
