slime ++
by SweetSylvie
Slime ++ turns slime blocks into a launching tool, with purple and redstone variants that throw players upward.
What it does
Slime ++ expands the slime features of the game. Its purple slime ball is crafted from the slimeball, and it is used to craft a purple slime block. A purple slime block works like a standard slime block but raises jump height. A redstone slime block acts as a launcher, sending a player who walks over it roughly 20 blocks forward, while a golden redstone slime block changes that launch height when right-clicked. Right-clicking a launcher can also send a player a few blocks upward.
A server running it needs every connecting player to have it too. It is published for Fabric only, for Minecraft 1.21 and 1.21.1. The 1.0.0 file for 1.21.1 is the latest build, and the code is licensed under the MIT License without being open source. The mod is at an early stage, and the author notes that there is not much content yet.
Key features
Purple slime block
A purple slime block is crafted from a purple slime ball and raises the jump height of players standing on it.
Redstone slime launcher
A redstone slime block launches a player who walks over it about 20 blocks.
Golden redstone launcher
A golden redstone slime block changes the launch height of the redstone launcher when right-clicked.
Upward launch
Right-clicking a launcher sends the player a few blocks upward, with a reach of up to 200 blocks.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Vertical travel
Launchers can carry a player up a tall build or onto a raised platform without climbing.
Parkour and traversal
Players can use the forward launch to cross gaps and reach distant areas quickly.
Who it’s for: Players who want slime blocks to do more than bounce, and server owners who want simple launch pads for building or traversal. The mod suits survival and creative worlds alike.
How it compares
Diegetic is a server-side only mod for Fabric under the GNU General Public License v3.0 or later, open source, for 1.21 – 1.21.11, so players join without installing it. Electromechanics is a client and server mod under the MIT License, open source, for 1.20 – 1.21.1, which adds machinery rather than launch blocks. Slime ++ needs both sides and covers only 1.21 and 1.21.1.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| slime ++ | Fabric | 1.21 – 1.21.1 | Client and server | 2026-05-31 |
| Diegetic | Fabric | 1.21 – 1.21.11 | Server-side only | 2025-12-09 |
| Electromechanics | Fabric | 1.20 – 1.21.1 | Client and server | 2025-04-24 |
Questions
Does Slime ++ need to be installed on the server?
Which loader does Slime ++ support?
Which blocks are needed to craft the purple slime block?
In the catalog
slime ++ is one of 3,932 Transportation mods on ModsFinder, and one of 2,390 Transportation mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from SweetSylvie
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What the author says
This mod expands slime features in Minecraft! This mod is in its early stages, so there isn't much content yet.
Official listing
- Modrinth page
- modrinth.com/mod/slime-plus-plus
- Owner
- SweetSylvie
- Published
- 2026-05-30
- Updated on Modrinth
- 2026-05-31
- Facts verified
- 2026-10-15