Half A Heart Mode
Half A Heart Mode is a Fabric game mechanics mod that sets each player's health to half a heart, so a single hit can end a run.
What it does
Once the mod is active, players are permanently reduced to half a heart, which is one hit point. The mod is built for hardcore survival: a single mistake, a mob encounter, a fall or lava ends the run. It is described as a challenge mod for players who want to test how well they can survive with almost no margin for error, and it works in both survival single-player and multiplayer worlds.
The mod is installed on the server and on each client that joins it, since the environment is client and server. It is published for Fabric only, with files for 1.21.8, 1.21.9, 1.21.10 and 1.21.11, and the latest file targets 1.21.11. The author notes it can be combined with a natural regeneration mod for a harsher experience, and that extra dependencies are required. The license is All rights reserved, so the code is not open source.
Key features
Permanent half-heart health
Players start with and keep only half a heart, equal to 1 hit point, instead of the usual full health bar.
Survival challenge
Fights with mobs, falls and lava become far more dangerous, which gives the mod its hardcore character.
Multiplayer support
The mode applies in survival worlds and on multiplayer servers, so a group can attempt the same challenge together.
Combinable with regeneration
The author suggests pairing it with a natural regeneration mod to raise the difficulty further.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Hardcore runs
Players who want a run where any mistake ends the world can use the mode as a fixed rule set.
Friendly competition
A group can compare how long each player survives under the same half-heart limit.
Who it’s for: The mod suits players who enjoy high-risk survival and server owners who want a harder shared challenge. It is not intended for players who want the standard health system.
How it compares
Half-Heart Hardcore is open source under the MIT License and runs on Fabric, Quilt and Legacy Fabric for 1.0 – 1.21.4, with the server-side only environment. Half A Heart Mode is a Fabric mod for 1.21.8 – 1.21.11 that both the server and players run, and it is not open source. OneHP is also a Fabric mod for 1.20.5 – 1.21.11 that runs on client and server, but it is released under All rights reserved, the same license as this mod.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Half A Heart Mode | Fabric | 1.21.8 – 1.21.11 | Client and server | 2026-04-11 |
| Half-Heart Hardcore | Fabric, Quilt and Legacy Fabric | 1.0 – 1.21.4 | Server-side only | 2024-12-07 |
| OneHP | Fabric | 1.20.5 – 1.21.11 | Client and server | 2026-02-02 |
Questions
Does Half A Heart Mode need to be installed on both sides?
Which game versions does Half A Heart Mode support?
Does Half A Heart Mode require any other mods?
In the catalog
Half A Heart Mode is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from ahmadmosaad2013
Similar mods
What the author says
Do you think you’re a true Minecraft survivor? One Heart Mode turns every game into a fight for life! Players permanently have only half a heart (1 HP).
Official listing
- Modrinth page
- modrinth.com/mod/half-a-heart-mode
- Owner
- ahmadmosaad2013
- Published
- 2026-04-11
- Updated on Modrinth
- 2026-04-11
- Facts verified
- 2026-10-15