1 HP
1 HP sets a player's health to one half heart, so a single hit can end the run in a hardcore world.
What it does
1 HP is a Cursed mod that lowers the health of the current player to one half heart and caps max health at that value. Installation is a datapack: place the datapack in the world's datapacks folder and launch the world. It also works on Fabric, Forge, NeoForge and Quilt for 1.21.8, with server required and client optional, under the Mozilla Public License 2.0 (not open source).
The change applies only to the current player, so other players on a multiplayer server keep their normal health. Because the mod is lightweight, it can be combined with other datapacks to make survival harder, and it is intended for a true hardcore experience. Files cover 16 release versions, 1.20 – 1.21.8, published since 2025-07-19 and last updated 2025-08-19.
Key features
Single half heart health
Health drops instantly to one half heart when the datapack is loaded in a world.
Capped max health
The maximum health of the player is set to one half heart, so healing cannot restore more.
Current player only
The effect applies only to the active player, leaving other players on a server unchanged.
Datapack combination
The datapack can be paired with other datapacks to add further survival difficulty.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x9 of 9 versions with builds
1.20.x7 of 7 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
True hardcore runs
A world can be played where any hit is potentially fatal, from the first moment it is launched.
Stacking difficulty
Server owners and players can pair it with other datapacks to make survival harder.
Who it’s for: Players who want a hardcore survival run and server owners who run datapacks on multiplayer servers. The datapack is meant for a world, so each world needs its own install.
How it compares
Half a Heart Hardcore is a Fabric, Forge, NeoForge and Quilt mod for 1.21.2 – 26.3, server required and client optional, under the MIT License and not open source. Half Heart Hardcore is open source under the MIT License, for 1.20 – 26.2 on the same four loaders and with the same server-required, client-optional environment. 0,5 HP covers 1.19.4 – 26.3 on the same loaders, also server required and client optional, under the MIT License, not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| 1 HP | Fabric, Forge, NeoForge and Quilt | 1.20 – 1.21.8 | Server required, client optional | 2025-08-19 |
| Half a Heart Hardcore | Fabric, Forge, NeoForge and Quilt | 1.21.2 – 26.3 | Server required, client optional | 2026-09-29 |
| Half Heart Hardcore | Fabric, Forge, NeoForge and Quilt | 1.20 – 26.2 | Server required, client optional | 2026-06-30 |
| 0,5 HP | Fabric, Forge, NeoForge and Quilt | 1.19.4 – 26.3 | Server required, client optional | 2026-08-20 |
Questions
Does 1 HP need Fabric API?
Can 1 HP be used on a multiplayer server?
Which game versions are covered?
In the catalog
1 HP is one of 7,555 Cursed mods on ModsFinder, and one of 4,235 Cursed mods for Fabric. 17,695 mods support Minecraft 1.21.8.
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/1-hp
- Owner
- Mythics Studios
- Published
- 2025-07-19
- Updated on Modrinth
- 2025-08-19
- Facts verified
- 2026-10-15