invalid_mod.jar
by adsw_studios
invalid_mod.jar is a NeoForge Cursed mod from adsw_studios for 1.21.1, built around an alternate reality game-style mystery.
What it does
Structures, entities and found fragments make up the content, with ambiguous purposes and unsettling arrangements of familiar materials. Players follow instructions and collect loot from the fragments to reach the intended outcome, and some entities give guidance. Installation covers the server and each player's game. It is released under All rights reserved, so the code is not open source.
Key features
Found fragments
Fragments scattered through the world can be collected for loot and clues about the mystery.
Unsettling structures
Structures built from familiar materials are arranged in unexpected ways, with purposes left unexplained.
Guiding entities
Entities in the world offer guidance that players may take or ignore, with their meaning left open.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Alpha 1.0_13 is a NeoForge mod for 1.21.1 – 1.21.8, also client and server, under All rights reserved and not open source. Lifeless.jar is a NeoForge mod for 1.21.1 only, with no environment listed and under All rights reserved, not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| invalid_mod.jar | NeoForge | 1.21.1 | Client and server | 2026-05-30 |
| Alpha 1.0_13 | NeoForge | 1.21.1 – 1.21.8 | Client and server | 2025-07-18 |
| Lifeless.jar | NeoForge | 1.21.1 | Not published | 2025-12-03 |
Questions
Does invalid_mod.jar need to be installed on the server?
In the catalog
invalid_mod.jar is one of 7,555 Cursed mods on ModsFinder, and one of 2,801 Cursed mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
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What the author says
invalid_mod.jar is a semi-horror, story mod where the game world isn't just a sandbox anymore - it's a volatile, reacting mechanism. Unlike traditional horror mods, it operates on a principle of non-intervention: it will not disturb your gameplay until you cross the line and make your first choice. A mod that was not…
Official listing
- Modrinth page
- modrinth.com/mod/invalid_mod.jar
- Owner
- adsw_studios
- Published
- 2025-06-26
- Updated on Modrinth
- 2026-05-30
- Facts verified
- 2026-10-15