Use the power-ups when you really need them

There are five different power-ups that you can use in Zombie Idle Defense to increase your chances of keeping the hordes of zombies away. These are:

  • First aid kit (restores 25% of a character’s health instantly)
  • Radio (calls a massive bomb that destroys all zombies on the screen)
  • Gas tank (deals damage and burns zombies in a given area)
  • Ape-S (All heroes get double Critical chance for 30 seconds)
  • Barrier (Creates a barrier that has 20% of characters’ health, blocking zombies)

These power-ups are difficult to get but, as you can see from their descriptions, they are really useful. However, we would recommend to only use them when you need to get 3 stars in a very difficult stage (like a zombie boss stage or a mini-boss one).

Because they are so difficult to get, it makes no real sense to use them in regular stages: these can be easily defeated if you simply upgrade your Heroes’ levels and weapons and use their skills smartly.