Memento Beta
by ArthurLlew
Memento Beta is a NeoForge world generation mod for 1.21.1 that adds a modernized Beta 1.7.3 dimension beside the overworld.
What it does
Players reach a separate Beta dimension that keeps the terrain, features and biome choices of Beta 1.7.3 while using modern block and structure data. Some modern structures appear there as well, and dungeons are kept small. The dimension has its own seed and its own day and night cycle, so it can be visited without changing the main world.
The mod also lets players visit well-known seeds from the Beta era and sets a modern world border around 30,000,000 blocks. Installation is a single NeoForge file for 1.21.1, and the environment is client and server, so the server and every player need the mod. The code is open source under the MIT License, and the source is public.
Key features
Modernized Beta dimension
A separate dimension recreates Beta 1.7.3 terrain with updated blocks and structures.
Own seed and day cycle
The Beta dimension keeps its own seed and its own day and night timing, apart from the overworld.
Famous seeds
Players can visit well-known seeds from the Beta period, with the world border set around 30,000,000 blocks.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Exploring old terrain
Players who want the feel of early Minecraft terrain can explore the Beta dimension without starting a new world.
Multiplayer servers
Server owners can offer the Beta dimension to all players, since every connected client needs the mod too.
Who it’s for: Players who want early-version terrain next to modern content, and server owners who host a Beta dimension for their community.
How it compares
Echo of the Farlands is a NeoForge mod for 1.21.1 that is also client and server and open source under the MIT License. Mob Mementos is another NeoForge option for 1.21.1 with the same environment, but it is open source under the GNU Affero General Public License v3.0 only, a different license from Memento Beta. Beta 1.7.3 Dimension covers a wider range of loaders and versions, 1.20.1 – 26.3 on Fabric, Forge and NeoForge, but it is server-side only and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Memento Beta | NeoForge | 1.21.1 | Client and server | 2026-10-09 |
| Echo of the Farlands | NeoForge | 1.21.1 | Client and server | 2026-08-03 |
| Mob Mementos | NeoForge | 1.21.1 | Client and server | 2025-12-27 |
| Beta 1.7.3 Dimension | Fabric, Forge and NeoForge | 1.20.1 – 26.3 | Server-side only | 2026-07-22 |
Questions
Which loader does Memento Beta need?
Does the server need Memento Beta?
Is the source code available?
In the catalog
Memento Beta is one of 8,515 World generation mods on ModsFinder, and one of 4,175 World generation mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
This mod adds modernized Beta 1.7.3 dimension.
Official listing
- Modrinth page
- modrinth.com/mod/memento-beta
- Owner
- ArthurLlew
- Published
- 2026-07-11
- Updated on Modrinth
- 2026-10-09
- Facts verified
- 2026-10-15