Other games feature “horde” modes, but none with the same level of “upgrading” to new and improved units over time as this one does. Good morning, everyone! My friends and I have been playing zombie world unity test hack world: unity a lot since last week, but we’ve started to wonder whether there are any other games that are similar to it. In the Zombie World, there are Unity Classes: Are you curious about how I created the map?.Are you just getting started? No problem at all.