Morbus is a Garry’s Mod game mode. It was written purely in Lua and was developed on and off by Remscar between 2010-2014 and then was updated periodically by the community from 2014 onward.
The aim of Morbus was to prove that multiplayer games have the potential as a platform for the horror genre of games. Players are either humans or aliens. Aliens can disguise themselves to look like humans however to turn other humans into aliens as well the alien must transform into their true alien form. Aliens win by infecting all humans while humans win by eradicating the alien threat. Each game round lasts around 10 minutes with humans winning by default if that time limit is reached.
Morbus aims to give everyone this experience, more than once
Videos
There are hundreds of videos on YouTube which feature Morbus. These are some from some notable YouTubers from 2013
Pewdiepie
See more on Youtube
Community Guides
A community member named AP Art History made a guide on how to play Morbus. It’s long but very detailed explaining the game’s mechanics and how to win
Or another guide that talks about different Morbus maps
Promotional Art
A lot of edgy promotional art was made by Remscar to attract players, here’s a sample of some of them.
Workshop
You can still find Morbus on the Garry’s Mod Workshop. It almost certainly doesn’t run anymore but it’s still there.
The future
It’s always been a dream of mine to recreate Morbus in a more modern game engine. While development hasn’t started yet, I have hopes that when S&Box gets to a more mature state, I will start developing Morbus again.