How do I install It Was My Mistake?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does It Was My Mistake work with?

The listing gives Minecraft 1.21.1, 1.21.8, 1.20.1. This is the version stated by the author or source site, not something we verified ourselves.

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It Was My Mistake

Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.

by R7X2 · on CurseForge

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader NeoForge2 builds
Mod loader Forge1 build

Minecraft version

Minecraft 1.21.8Newest
Minecraft 1.21.1

Minecraft 1.20.1Newest

⬇ Download for 1.21.8 · NeoForge ⬇ Download for 1.21.1 · NeoForge ⬇ Download for 1.20.1 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

It Was My Mistake adds a terrifying entity called Stop that stalks the player and becomes more dangerous over time. Looking back at it will cause it to chase and attack, leading to a jumpscare encounter.

Track Stop's impatience level with the Entity Level Preview, displayed at the top center of the player's inventory. If needed, the Potion of Rejuvenate can be used to reduce its level.

Don't look at it...

Stop now features a new model, simple animations, dialogue, and can attack nearby mobs. After killing a mob, it also has a chance to leave behind something unexpected.

Defeating Stop rewards materials used to craft Talisman → Ring → Artifact → Relic. Each tier further reduces the chance of Stop spawning after killing mobs.

The final Relic can be crafted into a powerful sword. Defeating Stop with this sword permanently prevents it from spawning, while another craftable item can restore its spawning.

This mod focuses on slow-building horror, progression, and tension rather than constant jumpscares.

JEI is recommended.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21.1, 1.21.8, 1.20.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as itwasmymistake-2.0.0-forge-1.20.1.jar — drop this file into the mods folder
Download size: 6.8 MB
Download link checked 2 Oct 2026 — working

These come from our own check of the pack file, not from the source page.