Slot Jam
by Neiliv
Slot Jam locks random inventory slots during play, so a player who keeps items in the bag may find some of them out of use until they pay in diamonds.
What it does
Every few seconds a random inventory slot locks automatically and stays out of use until it is freed. Freeing a slot costs a set number of diamonds, which is configurable. The time between locks is also configurable, and players can choose between random locking and a progressive mode that adds locks over time. The lock timer and related values can be adjusted in the configuration file.
The mod aims at hardcore and challenge playthroughs, modpacks and content creators who want a new survival concept. Commands let server owners and admins show, start, stop, reset and tune the lock settings, with separate commands for the interval, the count, the armor count and the main inventory. The mod runs on NeoForge for 1.21.1 – 1.21.8, and both the server and every player need it. The project is published under All rights reserved, so it is not open source.
Key features
Random slot locking
A random inventory slot locks at a set interval and stays out of use until the player spends diamonds to free it.
Progressive locking mode
An alternative mode locks slots in a progressive way, so the pressure builds up as the session goes on.
Configurable lock timing
The interval between locks and the diamond cost per freed slot can be changed in the configuration file.
Admin commands
Commands such as slotjam start, stop, reset and interval let operators control the lock state and settings.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Hardcore survival
Players who find standard survival too lenient can add the lock to make resource planning harder.
Modpacks and videos
Modpack builders and creators can use the mod to make a more original challenge for a playthrough.
Who it’s for: Players and server owners looking for a survival challenge, and modpack authors who want a limited-inventory rule with adjustable difficulty.
Questions
Does Slot Jam need to be installed on the server?
Which Minecraft versions does Slot Jam support?
How can a player free a locked slot?
More from Neiliv
What the author says
🛡️ SlotJam: The Ultimate Inventory Challenge Do you think Minecraft survival is getting too easy? SlotJam is here to disrupt your routine and put your organizational skills (and your nerves) to the test! The concept is simple yet ruthless: your inventory is closing in on you. 🕹️ How does it work? Every few seconds…
Official listing
- Modrinth page
- modrinth.com/mod/slot-jam
- Owner
- Neiliv
- Published
- 2026-04-25
- Updated on Modrinth
- 2026-05-01
- Facts verified
- 2026-10-15