Mods
Casualties Unknown mods
A sensible load order for a first modded run
- BepInEx 5The loader everything else needs
- CUCoreLibOnly if a mod lists it as a dependency
- One quality-of-life modQoL Unknown keeps the rules unchanged
- One big gameplay modAdd a second only after the first runs clean
Short answer: the most downloaded Casualties Unknown mods are Casualties Together for co-op, CUCoreLib as a required library, Multiplayer Sprite Replacer for skins, QoL Unknown for convenience and Prosthetics for limb replacements. Nexus listed 544 mods on 9 November 2026. confirmed
Download counts show what people install, not what suits you, so the tables below group mods by what they do. Every mod here needs BepInEx.
Most downloaded Casualties Unknown mods
| Mod | Type | Downloads | Endorsements | Last update |
|---|---|---|---|---|
| Casualties Together | Co-op | 143,012 | 1,166 | 8 Nov 2026 |
| CUCoreLib | Library | 36,038 | 629 | 22 Oct 2026 |
| Multiplayer Sprite Replacer | Skins | 31,240 | 521 | 20 Jun 2026 |
| QoL Unknown | Quality of life | 29,573 | 617 | 22 Oct 2026 |
| Prosthetics | Gameplay | 29,040 | 478 | 24 Oct 2026 |
| Gunsaw Genetics | Species | 26,714 | 522 | 4 Oct 2026 |
| CatPatch | Co-op add-on | 24,754 | 522 | 8 Nov 2026 |
All figures are from the Nexus listing and are confirmed for that date.
Which mods change the least?
Pick these for a first modded run, because they keep the game’s difficulty as designed.
- QoL Unknown is meant to add accessibility and convenience without changing core mechanics. confirmed
- Simple QoL adds smaller touches, such as a live timer for stat training, and also works alongside co-op. confirmed
- Casualty Vitals focuses on showing body information.
- Better Crafting Logic adjusts how the crafting list behaves.
What are the best gameplay overhaul mods?
These change how the game plays, so install one at a time.
| Mod | What it adds |
|---|---|
| Alexx_’s Medical Brutalism | A harsher, deeper medical system; 7,067 downloads and updated 2 November |
| Viscera n’ Vitals | A popular medical overhaul that players search for by name; recordings call it stressful and complex reported |
| Prosthetics | Three tiers of limbs, plus eye and jaw prosthetics |
| Casualty Psychology | Reworks mood into fear, trauma and panic attacks |
| New layer mod | Extra layers, written for Demo 7.0.1 |
| ScavShrapnelMod | Physically simulated explosion fragments, synced in co-op |
| Gunsaw Genetics | 14 species plus albino, chosen at the start of a run |
The Prosthetics mod overlaps with the base game now. The developer’s September update added an official system with three prosthetic tiers to the full game, and said modders would likely expand on it. confirmed Check for conflicts before running the mod on the full release.
Which mods do you need for multiplayer or skins?
Co-op has its own multiplayer guide, with CatPatch as the most popular add-on. Skin changers are compared on the skins page.
Which libraries do mods depend on?
Libraries do nothing alone. Install one only when a mod page asks for it. confirmed
| Library | Status on 9 Nov |
|---|---|
| CUCoreLib | Actively updated, with APIs for items, liquids, recipes and multiplayer |
| ICEneco’s Custom Item API | Updated 29 August |
| RshLib | Marked unsupported by its author |
| ScavLib API | No longer maintained; its author suggests another library |
How should you combine mods?
Mods for this game patch the same body and item code, so more mods means more chances of breakage. These habits save time.
- Add one mod, launch, and start a run before adding another.
- Match versions. A mod written for Demo 7.0.1 may not load on the full game.
- Read each page’s compatibility notes, especially for co-op.
- Keep your saves. Several authors warn that updates can break them.
- Expect a wait after a big patch. Some authors paused until the full game shipped, including one food overhaul.
Are Casualties Unknown mods safe and allowed?
Modding is common and open. The developer linked a community wiki in official posts and said in September that people would expand on the prosthesis system with mods. confirmed Mods are still third-party code, so use Nexus or the author’s own GitHub.
Some mods on Nexus are flagged as adult content. This list leaves them out, and Nexus hides them unless you opt in. If you are after a cheaper way to experiment, console commands need no mods at all.
Which mods add languages or more dialogue?
The official game supports English and Simplified Chinese only, so translation mods are popular. confirmed
- Russian Mods Translation translates other mods into Russian, with 2,090 downloads.
- Universal Russian Patch covers both the game and its mods.
- A Simplified Chinese supplement exists for the co-op mod.
- More (custom) dialogs adds 630 new lines in three languages, with 1,772 downloads.
Language mods depend on the exact text in the game, so they are among the first to break after a patch.
Sources
Last checked 9 November 2026. Marks: confirmed = official notes, in-game text or a recording of the game; reported = two or more players; unverified = one source.