extraes-SepticSurvival icon


Fight off waves of enemies beneath the metropolis of MythOS!

Last updated a year ago
Total downloads 4314
Total rating 5 
Categories Custom Maps
Dependency string extraes-SepticSurvival-1.0.3
Dependants 0 other mods depend on this mod

This mod requires the following mods to function

gnonme-ModThatIsNotMod-0.3.0 icon

A mod for loading in custom items, making life easier for other mod creators, and a whole lot more.

Preferred version: 0.3.0
WNP78-FieldInjection-1.1.0 icon

A utility for other mods to inject monobehaviour fields

Preferred version: 1.1.0
Maranara-Custom_Maps-2.1.0 icon

Custom map loader for BONEWORKS

Preferred version: 2.1.0
extraes-JeviLib-2.0.3 icon

A multifunction library for code modders, containing debugging, patching, preferences, and other utilities as well as tweening.

Preferred version: 2.0.3


Septic Survival

Fight off waves of enemies beneath the metropolis of MythOS!

You can watch the trailer here


This map is very scarce with ammo, and has limited health. If you want to last a long time, you should get good with melee.

This map has tons of music tracks, ranging from Ultrakill to World of Goo, but if none of those suit you, simply get better taste in music use the silent track set and play your own music through Spotify or something.

This map supports custom NPCs! They will act similarly to normal zombies, however they won't have the arm particles if they can throw "fireballs".

How is this different from ZW_Bank?

  • This map is an evolution of ZW_Bank in nearly every way

    • It is more optimized, using less RAM and CPU, as it better integrates with the game's systems.

    • It now properly tracks NPCs it spawns, and limits the number it spawns, instead of spawning an infinite number before arbitrarily clearing them.

    • It doesn't rely as heavily on NPCs jumping and falling everywhere.

    • The music doesn't dictate the gameplay (weird, I know, but that's how ZW_Bank worked)

    • It now gives you ammo in dedicated resource locations (there are two).

    • ZW_Bank was intended to have a truck that cycles videos, which never panned out. This one did! Thanks FieldInjector!

While dying doesn't fully reload the map, the behavior of dying and respawning isn't 100% known or intended.

Disclaimer: This map disables commonly used functions that provide an unfair advantage

Among the disabled mods are AimHacks (I mean c'mon), EasyMenuUtilities (ammo count modification), and SpidermanMod (regeneration & strength).

These won't be disabled in the event that you complete the Easter Egg hidden in the map.

Don't worry, I've hidden hints as to how to access and complete the Easter Egg, but it will likely take a full game restart for some changes to take effect.

These shouldn't be disabled when the map isn't loaded.

If you have any problems with the map, you can reach me in the BONELAB community Discord server, my username and tag are extraes#2048. I don't have friend requests enabled, so you should ping me in the #mod-help channel with a description and video clip of what you're experiencing, as the map doesn't log much to avoid repeating the ZW_Bank log spam fiasco.

If you want to view what it logs, install UnityExplorer and enable "Log Unity debug"


  • 1.0.3

    • Fixed some more geometry holes, reorganized some parts of the map.
    • Double check one of the gamecontrol-critical references when using it (for the non programmers: "i proofread my essay before turning it in").
  • 1.0.2

    • Minor update this time! No accompanying JeviLib update.
    • Hid some geometry seams (and rebake lights to accomodate)
    • Messed with some aspects of the secret.
    • Added some more videos to the video player
    • Changed the trailer to the Kiltro version. It's better in just about every way imo.
  • 1.0.1

    • Fixed CMaps 2.1.0 bundle unloading weirdness
      • Fix streamed audioclips being unloaded when the map bundle is unloaded
      • Fix videoclips being unloaded when the map bundle is unloaded
      • These were fixed via a JeviLib update
    • Add some new videos to the video player
  • 1.0.0

    • Initial release

Shoutouts to the unsung hero of BW custom mapping: LocalizedText

Available versions

Please note that the install buttons only work if you have compatible client software installed, such as the Thunderstore Mod Manager. Otherwise use the zip download links instead.

Upload date Version number Downloads Download link  
2022-8-17 1.0.3 2945 Version 1.0.3 Install
2022-8-15 1.0.2 364 Version 1.0.2 Install
2022-8-9 1.0.1 597 Version 1.0.1 Install
2022-8-7 1.0.0 408 Version 1.0.0 Install