CurseForge · Minecraft mod
Once Forgotten
Expanding on Minecraft's lore!
Quick answer
Which Once Forgotten release should I use?
Once Forgotten onceforgotten-1.9.5-1.19.2.jar targets 1.19.2 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. All 2 required mods have matching files.
Where it goes
Is Once Forgotten required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Once Forgotten onceforgotten-1.9.5-1.19.2.jar need?
onceforgotten-1.9.5-1.19.2.jar. Change the file and its required mods may change too.
Install GeckoLib, Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
1 extra mod was pulled in by another dependency. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Once Forgotten without breaking your instance.
Built for Once Forgotten onceforgotten-1.9.5-1.19.2.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use onceforgotten-1.9.5-1.19.2.jar. It targets 1.19.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install GeckoLib, Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside onceforgotten-1.9.5-1.19.2.jar. It opens that exact file at the source.
About this project
What does Once Forgotten add?
Depends on at least Geckolib Fabric 3.1.6!
"The past can never truly be forgotten. History always repeats itself....."
-An entry from a journal found during excavation of a stronghold library

Welcome to Once Forgotten! The main goal this little pet project of mine has is to expand Minecraft lore using new items, mobs and blocks to do so. Throughout your adventures here, you may find new blocks, mobs and ores to aid you in your journey across what seems to be an ever-evolving world!
For example, the Worldforge is a necessary piece of ancient (and future) history found within the End. Inside lies many new items and blocks for you to uncover.
What will you find?
Fine, here's the full mod details if you want them:
Structures:
Chapter 1: Histories Revealed
The Worldforge
These structures spawn in the End, scattered around from some unspoken time. They are composed of Hardened Metal Plates, Luminous Metal Plates and Hardened Metal Supports, making the only way for a player to get in either moving a block with a piston or breaking through the heavily Oxidized Copper doors. Inside are 5 separate rooms (not including the hallways)
Chapter 2: Rediscovered Technology
Factorus Mechanus
Found underground, these seem to be some sort of old base or factory completely constructed out of various copper blocks and dotted with Copper Gears. Inside are various different rooms containing valuable loot, some of which is exclusive to the structure.
Items:
Chapter 1: Histories Revealed
- The Tools of War: Melting Scrapped Metal in a Blast Furnace will give you Raw Uru. Smelt that once more to get Uru Ingots, and combine those into a Block of Uru which can be combined with sticks and Netherite Scrap in different formations to make an Uru Longsword, an Uru Waraxe, an Uru Warhammer, and a Uru Warspade.
- Armor Shards: Combine 9 in a crating table to get Scrapped Metal.
Chapter 2: Rediscovered Technologies
- Copper Nugget: Obtained just like any other nugget with its ingot, it is essential to have these on hand to craft most new Copper blocks and items in this mod.
- Lapis Lazuli Dust: When mining Deepslate Lapis Lazuli, there is a small chance your forceful hits will make it drop this new item. It can be used to craft the second new item......
- Tempus Dust: Combining Redstone Dust and Lapis Lazuli Dust will create this essential crafting material. If you have an Ender Pearl, you can surround it with this to duplicate it! Yet....something about it.......seems familiar......
- Tempus Crystal: When Diamonds and Tempus Dust are put together, you get Tempus Crystals! They can be used to craft Blocks of Tempus Crystal and more.
- Malformed Ender Pearls: If you're having trouble collecting Ender Pearls, a Spider Eye and Tempus Dust can create a suitable substitute.
- Crystalline Heart: A rare item found within a Factorus Mechanus, this item can be consumed for temporary extra hearts and Regeneration.
- Powerful Contraption Piece: The only other exclusive item to a Factorus Mechanus, these pieces are necessary to craft a powerful new tool.
- Power Armor: Made with a Block of Tempus Crystal, Powerful Contraption Pieces, and assorted copper items, this essentially functions as a chestplate without the protection. When worn, the Tempus Crystal block speeds up your mining by giving you the Haste effect.
Blocks:
Chapter 1: Histories Revealed
- Copper Gear: More for decoration, this block is used in various crafting recipes.
- Clockwork Mechanisms: Crafted with Copper Gears, Copper Ingots and Copper Nuggets, this block loses its redstone power as it oxidizes.
- Reversed Clockwork Mechanisms: If any of the various oxidized Clockwork Mechanisms (besides the unaffected one) are surrounded with Tempus Dust, they will begin to oxidize backwards all the way back to the unaffected form.
- Block of Tempus Crystal: Both a redstone power emitting block and a light source, this is essentially storage for Tempus Crystals.
Entities:
Chapter 2: Rediscovered Technologies
- Factorus Guardian: Looking like a bipedal, land-based Guardian, this mob can be found roaming the corridors of a Factorus Mechanus. Its drops are mostly the same as a Guardian, with the added chance of obtaining a Copper Gear or two. It attacks all mobs except for other Factorus Guardians.
Q: Will you port to Forge?
A: No [Forge is lame, massive L]
Q: Can I use this in a mod pack?
A: (Insert generic "yes, but credit me first" response)
Q: What's coming in the next update?
A: You'll see. :3
Project description from CurseForge.
Pick your setup
Once Forgotten by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.19.3
1 loader build1.19.2
2 loader builds1.19.1
2 loader builds1.19
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Once Forgotten versions and loaders
onceforgotten-1.9.5-1.19.2.jar
2 Apr 2023
onceforgotten-1.9.5-1.19.3.jar
28 Jan 2023
onceforgotten-1.9.4-1.19.2.jar
3 Dec 2022
onceforgotten-1.8-1.19.2.jar
25 Nov 2022
onceforgotten-1.6-1.19.2.jar
25 Nov 2022
onceforgotten-1.0-1.19.2.jar
7 Oct 2022
onceforgotten-0.7-1.19.2.jar
11 Sept 2022
onceforgotten-0.5-1.19.jar
7 Sept 2022
onceforgotten-0.4-1.19.jar
29 Aug 2022
onceforgotten-0.3-1.19.jar
28 Aug 2022
onceforgotten-0.2-1.19.jar
12 Aug 2022
Looking for an older file? The official CurseForge project page is in Resources.