Survival in the sky — a void overworld of procedural floating islands to explore, settle, and connect with harpoons and ropes. Built for NeoForge 1.21.1; world rules stay fair in multiplayer because the server is the source of truth.
| Minecraft | 1.21.1 |
| Mod loader | NeoForge (use the file that matches your game) |
| Where it runs | Single-player, LAN, and dedicated servers — same mod on client and server |
Forget the endless flat overworld. Project Island generates floating islands over the void: each island is its own chunk of terrain and biomes, ready for bases, farms, and adventure. Jump between peaks, bridge the gaps, or ride the ropes you and your friends string between anchors.
Whether you play solo or on a server, islands, starters, rope links, and navigation hints stay in sync so everyone sees the same world — no client-only ghost islands.
These mods are not inside the Project Island jar. Install NeoForge 1.21.1 builds from their own pages if you want the extras:
Exploration & loot
Creatures & structures
RPG-style gameplay (examples)
World variety
After the first launch you get two TOML files in config/. Every setting has an inline comment next to it — that’s the full reference for names and defaults.
| File | Who uses it | What it’s for |
|---|---|---|
projectisland-common.toml |
Server (including the host in single-player) | World generation — island size and frequency, biomes (including modded surfaces), structures and villages, ores and decoration, mob spawn tuning, starter islands, void rescue, rope rules (length, health, surfing, limits), HUD sync to clients, and optional hooks when other mods are installed. |
projectisland-client.toml |
Your game client only | How things look — island HUD style, optional Xaero’s waypoint mirroring, rope line and health-bar drawing. Ignored on a headless dedicated server. |
Tip for hosts: change common when you want the world or rules to change for everyone. Change client when you only want to adjust your own overlays and visuals.
