Oneblock
by Diesse
Players who want a survival challenge can start Oneblock with a single floating block suspended over the void, where that one block is the only ground under them.
What it does
Oneblock is a minigame mod that places the player on one floating block in the void. The starting block is dirt or another material, and it is the only thing that keeps the player from falling. Breaking it causes another block to appear in its place, and the blocks that appear vary between dirt, wood, stone, ores and other types, some of which yield useful resources.
The goal is to survive and thrive from that single block. Players expand the island, build structures, farms and automation systems, while limiting resources, staying clear of the drop and dealing with mobs that spawn nearby. Progress moves through several phases in which increasingly advanced resources become available.
Oneblock is published for Fabric, Forge, NeoForge and Quilt, with a matching data pack for servers that cannot run the mod. Files cover 1.21 – 1.21.10 across 11 release versions, and the latest builds for every loader are 0.3+mod for 1.21.10, dated 2025-10-12. The server is required and the client is optional, and the mod is released under CC0 1.0 Universal, which is not open source. The issue tracker is publicly linked.
Key features
Starting block
Each run begins with one block of dirt or another material, and falling off it ends the run.
Block regeneration
When the initial block is broken, a new block appears in its place, keeping the island going.
Varied block drops
Generated blocks range from dirt and wood to stone and ores, and some carry useful resources.
Phased progression
The game advances through stages that open increasingly advanced resources as the player gathers them.
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who like sky-block style challenges and server owners looking for a minigame with resource limits and phased progression.
How it compares
BlatBlock is a Forge mod for 1.20.1 that needs both client and server, and it is open source under the MIT License. No Void runs on Fabric, Forge, NeoForge and Quilt for 1.21.6 – 26.3, is server required with client optional, and is closed under All rights reserved. Void Sword is a NeoForge mod for 1.21.4 – 1.21.9 that needs both client and server, and it is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Oneblock | Fabric, Forge, NeoForge and Quilt | 1.21 – 1.21.10 | Server required, client optional | 2025-10-12 |
| BlatBlock | Forge | 1.20.1 | Client and server | 2026-05-14 |
| No Void | Fabric, Forge, NeoForge and Quilt | 1.21.6 – 26.3 | Server required, client optional | 2025-09-20 |
| Void Sword | NeoForge | 1.21.4 – 1.21.9 | Client and server | 2025-10-07 |
Questions
Does Oneblock need a specific loader?
Does a player need Oneblock installed to join a server?
Which game versions does Oneblock support?
In the catalog
Oneblock is one of 2,135 Minigame mods on ModsFinder, and one of 1,454 Minigame mods for Fabric. 15,569 mods support Minecraft 1.21.10.
More from Diesse
Similar mods
What the author says
Oneblock is a server-side Data Pack / Mod that add a variant of the popular game Minecraft, designed as a challenge for players. In this mode, players start on a single floating block in the void.
Official listing
- Modrinth page
- modrinth.com/mod/oneblock-data-pack
- Owner
- Diesse
- Published
- 2024-07-17
- Updated on Modrinth
- 2025-10-12
- Facts verified
- 2026-10-15