Coins

Coins are the currency of this game. They can be obtained from killing zombies, buying them with robux, or you can join the group to get a starter 10,000 coins. The harder the zombie, the more coins you earn.

Use
The point of coins is to buy better weapons. Each weapon except the starter ones cost coins. You can also buy pets, player zombies, and cosmetics with them. They are also used for achievements. There are a few achievements that require you to earn coins.