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Replicator First Type

Evolving slimes harness solar energy and develop genetic mutations. Predatory spiders create evolutionary pressure. Features 12+ genes, horizontal gene transfer, DNA scanner. Watch natural selection in your Minecraft world!

NeoForge
Loaders
NeoForge
Downloads on Modrinth
127
Followers on Modrinth
1
versions
2
Updated
July 20, 2026Jul 20
Published
in 2026

At a glance

Runs on NeoForge
For Minecraft 1.21.1, 1.21.8
Needed in the game and on the server
Latest version — 1.3.0 from July 20, 2026
License Apache-2.0 — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.21.1, 1.21.8

logo mode

Replicator First Type introduces a living evolution ecosystem to Minecraft where pink replicator slimes spawn, adapt, and evolve through natural selection. These unique creatures harness solar energy through photosynthesis, seeking open sunlight when their energy drops or entering hibernation in darkness. This creates dynamic behavioral patterns as slimes navigate their environment to survive.

The mod features an advanced genetic system with over 12 different genes that affect size, speed, health, color, and special abilities like thermoregulation, flight, toxicity, and attack instincts. Slimes pass these traits to offspring through horizontal gene transfer, where newborns adopt genetic characteristics from nearby slimes rather than traditional reproduction. Each world generates unique evolutionary paths based on environmental pressures and random mutations. slimes

Predatory spiders serve as the primary threat, hunting slimes to sustain themselves. After successfully killing a certain number of slimes, spiders lay eggs that hatch into new predators. The more successful a spider becomes at hunting, the more offspring it produces, creating intense evolutionary pressure on the slime population. Slimes equipped with attack genes can fight back and destroy spider eggs, establishing an evolutionary arms race between the two species.

spiders The ecosystem self-regulates through survival pressure, where aggressive slimes risk death while passive ones hide but miss opportunities. Population sizes fluctuate naturally based on available resources and predation success. Players can observe evolution in action using the DNA Scanner to analyze slime genetics and track mutations over time.

The Mushroom (Passive Mob) A completely new passive creature that stays in place Spreads spores that affect nearby slimes mushrooms

Evolution System Slimes can now transform into other creatures based on their genes reaching peak values: Slime → Mushroom: When gene M reaches 4 Spider → Spider Queen: When MAX_HUNTER reaches 25 More transformations coming soon!

The mod is designed primarily for creative mode but includes foundations for survival adaptation. Future updates will expand the ecosystem with additional genes, new creatures, environmental challenges, and increased genetic diversity.

FAQ

How to install Replicator First Type?

Install NeoForge for your Minecraft version, download Replicator First Type for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Replicator First Type support?

Replicator First Type has builds for Minecraft 1.21.1, 1.21.8.

Is Replicator First Type needed on the server?

Needed in the game and on the server

License and source
Apache License 2.0free to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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