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Hi everyone!, this is my first post in ZDoom so I hope I am doing things correctly. I am here to share a project that I started first for Zandronum years ago but now I recreated it for GZDoom (also it works with LZDoom)
Invasion Simulator
What is this?
The name says it all, this mod tries to make any map into an invasion map. The main difference between this version and the old version for Zandronum is that this version is universal (thanks ZScript), so it should work with your favorite gameplay mod, monster pack or even total conversion. Also this version include boss waves that were not present in the Zandronum version. And of course, this mod is prepared for multiplayer. This version by now only works in maps that already have monsters. I really recommend to play this using GZDoom Coop Utils (link below), since it includes Survival Game mode for GZDoom and other useful online features like seeing the name of your ally when you aim at them.
CVARs
is_wavemultiplier (default 1.0): Multiplier for the amount of monsters to spawn per wave.
is_maxwaves (default 3): Amount of waves to play (Minimum value is 3)
is_skill (default 1): From 0 to 3, the difficulty of the invasion. (The bigger the number the bigger the amount of enemies and also of bosses to spawn per wave)
This mod is a lot of fun! I was trying to create some levels that would work better with it so I changed some settings in obsidian. I dropped the level size to the smallest it would go. Then I turned off keyed doors and switch goals. Works really well but still hard even with two companions! I've been trying to find something like this mod for a while.