Endless Zombies

Endless Zombies is a cooperative Slayer gamemode that spawns waves of increasingly difficult enemies and bosses. Offering dozens of options and the ability to add your own custom enemies (Requiring tiny bits of scripting), this is a versatile gamemode that lets you create anything between simple zombie apocalypses to invasions of giant alien horses with rocketlaunchers.
A game ends either by manual reset or when all players run out of lives. Difficulty can be scaled in three different ways: Zombie health, zombie damage and zombie count. Different kinds of zombies can be turned on and off in the options. There are also various options for earning points and other things.

All options should be pretty self-explanatory. The mode comes with an example script that contains informations on how to make your own enemies and bosses for this gamemode.

Requires Slayer and the default weapons.

Credits to Brian Smith for the initial idea and parts of his AI and everyone who helped testing this.