About gm_moebius | Underground Map
From Steam Workshophttps://i.imgur.com/ZqoJ5Z8.png PLEASE READ THE DESCRIPTION, USE WEATHER ADDONS ON YOUR OWN RISK. If mushrooms are acting strange and are stretching out try to switch your gmod to x86 version by…

PLEASE READ THE DESCRIPTION, USE WEATHER ADDONS ON YOUR OWN RISK.
If mushrooms are acting strange and are stretching out try to switch your gmod to x86 version by going into Options -> Game versions
Presenting THE MAP, the first fully featured and highly detailed underground map in Gmod. This map was created for the Underground Worlds Map Contest organized by the Hammer Editor Development Group in almost under two months.
During development, we did not really have a clear idea of what we were doing at first, but eventually we settled on a very underexplored and specific niche in Gmod: a cave map. We were heavily inspired by a mix of various games like Elden Ring, Sekiro, and Subnautica. As a result, we decided to try a somewhat mythical, slightly fantasy style for the map while focusing on maintaining a high level of detail.
In general, the map is suitable for exploratory gameplay, sandbox, or roleplay use. However, we still recommend experiencing the map for the first time in a way that allows you to explore it fully and discover all of its features.
Original soundtrack composed by B4N5H33 - https://www.youtube.com/watch?v=e7aygJEqWVM
Basic navmesh - https://steamcommunity.com/sharedfiles/filedetails/?id=3683202966
Credits:
Cena - Mapping, texturing, and overall insane amount of manual work. Kawasaniac - Modelling, texturing, vibes. B4N5H33 - Sound design, music, playtesting. The Immortal - Playtesting. Commander - Playtesting. Quixel, Valve, Epic Games, FromSoftware, Dear Esther and many more - Assets, tools, ideas and vibes.
Disclaimer:
1) It is recommended to have music, HDR and color correction enabled to experience the map fully. 2) Unfortunately due to how the general fog system works on the map, we do not recommend you to use any custom weather addons or manipulate the environment in any unpredictable manner aside from default gmod tools. Use other global addons on your own caution. 3) You can disable the push script for the sphere, waterfall, and river in the admin room!
Tags: [spoiler]map cave cavern underground fantasy mythical mushroom deep dark grim exploration fog atmosphere[/spoiler]
Highlights
From source dataFootprint
Rated a light load on a server.
Last update
Its author last shipped an update 8 mo ago.
gm_moebius | Underground Map on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Garry's Mod servers. We download it from Steam Workshop, place it, and restart the server.
- Server load
- light
- Smallest plan we suggest
- Garry's Mod — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 2026-03-11, released 2026-03-11
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Workshop |
From 1 recorded build of gm_moebius | Underground Map.
Run gm_moebius | Underground Map on a Garry's Mod server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogMaps & scenarios
Custom maps, arenas and scenarios to play on.
Compatibility
- Game
- Garry's Mod
Verified at the source
- ✓Steam WorkshopOfficial listing, checked 2026-11-01Open ↗
- ✓Authorcena, as published on Steam Workshop
- ✓LicenseNot published by the sourceFree
