Requirements for an Infection map?

Okay, I’m trying to build a map made for a particular infection gametype in Forge Worlds. I started from the blank slate version, and it won’t let me play it. It just says that the map does not support that gametype.

What do I need for Infection to work?

And while we’re on the subject, what do I need for any specific gametype to work? I have another map that won’t let me play oddball, and I can’t find anything that states where a ball spawns. And if I go down the list, I’m just gonna wonder what it stopping me from playing any particular gametype, so I’d appreciate if someone could post a comprehensive list.

Thank you.

This should help you