CosmosMC's OneBlock starts you on a single regenerating block above the void. Mine it forever,
climb through themed phases, and expand your island block by block. Free on Java and Bedrock
at play.cosmosmc.org - and your island never resets.
Server facts
| Server | CosmosMC - OneBlock |
|---|---|
| Unique players | 3M+ |
| Server age | 6+ years |
| Community | Amazing & friendly |
| Access | Free, public, no whitelist |
| Versions | Any version, Java & Bedrock crossplay |
| World | One regenerating block over the void |
| Island resets | Never |
| Griefing | Not allowed |
The gamemode
You spawn on a single block floating over the void. Break it and another instantly takes its place - dirt this time, then stone, then wood, an ore, a chest, sometimes a mob hitching a ride. Every block you mine is one more block for your island, and the further you get, the stranger and richer the block becomes.
Plains → The End
Keep mining and the block carries you through themed phases - plains, underground, jungle, desert, all the way to the Nether and The End. Each phase unlocks new materials, new chests, and new creatures for your island.
From platform to world
Nothing exists around you - everything comes from the block. Place what you mine to build outward over the void: platforms become farms, farms become halls, and one block becomes a floating world with your name on it.
Vehicles
Even over the void, there's machinery: planes and helicopters that make island-hopping a
joyride, plus trains, race cars, hoverbikes, tanks, tractors, and drills - the whole fleet,
bought from the /shop with money you earned in-game.
How to join
PC · any version
play.cosmosmc.org./is create!Phone, console & Windows · any version
JoinCosmos1.
FAQ
Join play.cosmosmc.org on Java Edition, or the same address with port 19132 on Bedrock, then pick OneBlock from the gamemode menu and create your island with /is create.
You start on a single block floating over the void. Every time you mine it, a new block instantly takes its place - materials, ores, chests, even the occasional mob. Everything you collect becomes building material for your own floating island.
Mining the block moves you through themed phases - plains, underground, jungle, desert, and on to the Nether and The End. Each phase changes what the block can drop, so your island keeps unlocking new materials as you progress.
No. Like every CosmosMC gamemode, OneBlock never wipes - your island and everything on it are permanent.
Work jobs, complete quests, and fish - then sell to other players on the player-run market. Every price comes from real trading, not admin shops.
Yes - the full garage is available from the /shop with in-game money, including planes and helicopters that feel right at home over the void.
No mods - a resource pack loads automatically when you join and handles all the custom content on Java and Bedrock.
Yes - furniture from the /shop works on OneBlock, so your island home can be properly furnished.
More gamemodes
Survival on a 1:80 scale map of the real Earth.
Learn more →Classic SMP on a 40,000 x 40,000 block world.
Learn more →Semi-vanilla survival on islands over the void.
Learn more →Updated July 2026