(Doom Builder 2) ZDoom Monster Spawning Tutorial
This tutorial shows how to spawn monsters from out of nowhere using some of ZDoom's ACS scripting features. In this example, when a chaingun is picked up four enemies spawn on raised pillars all around the player. Make sure you choose, "ZDoom (Doom in Hexen format)" to follow along with this tutorial rather than "Doom" or even "Doom 2" from the New Map menu!