MC Big Legacy
A mod for b1.7.3 that makes your minecraft world bigger than the observable universe by using java's BigInteger class for coordinates instead of 32 bit…
⬇ Download on Modrinth
THIS MOD REQUIRES JAVA 25! Version 1.1.0 requires Gen 2 ornithe whichs the installer ui doesn't support, you have to install a Gen 2 instance with the command line
Please don't attempt to run this mod on a server currently its not supported but may be implemented later.
Currently entities, and rendering are a bit buggy.
Disclaimer Due to various unpredictable bugs that happen very far out, visuals such as flashing colors or jittery gameplay can and likely will happen, viewer discretion advised
Basic usage
- As of McBig 1.1.0 we now use brigadier for commands. Do /help to view all commands
- Flight can be enabled by doing /fly. It works the same way as modern.
- Noclip can be enabled by doing /noclip.
- /tp which works very similar to how the modern tp command does
Some example commands:
/tp 12550000 130 0
/tp 999999999999999999 ~ ~
What happens when you go far out Due to this project being expertimental its quite possible the game will become more laggy the further you go out. If the game freezes for longer than 20 or so seconds I recommend just killing your game instance.
The stripelands can be enabled by leaving the fix stripelands box unchecked on startup
Compatibility This mod is very likely not going to work with other ornithe/fabric mods due to how invasive this mod already is. Some simple mods may work but may lead to undefined behavior. RetroAuth seems to work with no issues
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: b1.7.3
- 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 Modrinth — 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.
- Ships as beta-mcbig-1.1.0.jar — drop this file into the mods folder
- Download size: 739 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.