Swapocalypse
Play a fully customizable Death Swap game mode with unlimited players!
Screenshots
About this Mod
Swapocalypse is a Minecraft datapack for versions 1.21.x that introduces a custom Death Swap mode. At configurable intervals, all players randomly switch positions, creating a thrilling battle where the last player standing wins!
Features
- Unlimited players
- Customizable swap timer
- Wide range of configurable settings
- True randomness with Fisher-Yates shuffle for unpredictable swaps
Settings
| Setting | Description | Options | Recommended |
|---|---|---|---|
| Worldborder Size | Sets the world border size. | Automatic or 1 – 1,000,000,000 |
100 – 1,000,000 |
| Max Deaths | Number of deaths before elimination. | 1 – 10,000 | 1 – 20 |
| Nether Travel | Allows players to enter the Nether. | true / false |
(User preference) |
| Swap Interval | Time (in seconds) between swaps. | 10 – 50,000 | 20 – 10,000 |
| Swap Announcement | Alerts before swapping. | Never, 5-Second Countdown |
(User preference) |
| Timer Display | How the swap timer appears. | No Display, Show in Actionbar |
(User preference) |
| Max Health | Sets player health limit. | 1 – 1024 | 1 – 100 |
| Hunger | Enables or disables hunger mechanics. | true / false |
true |
Install
You can download the latest version of Swapocalypse through the Modrinth App or directly from this project page!
There are two versions: the datapack version, which you need to install manually in each world, and the mod version, which is just a repackaged datapack that will run in each world in the instance automatically. The functions of both are identical.
Roadmap
These features may be added in future updates, however they are not guaranteed. Bug fixes are generally prioritised over these.
- Detect players sitting on the death screen after a non-elimination death (planned)
- Easier way to switch between spectator and player (planned)
- Swap players at a random time range (e.g every 3 - 5 minutes) (planned)
- Teams mode (planned)
- Make a Wiki (planned - select the Wiki tab at the top!)
Available Versions
How to Install Swapocalypse on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set datapack Loader
In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.4).
Install Mod
Open the mod browser in the dashboard and search for "Swapocalypse". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.4, 1.21.3, 1.21.2 (+2 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Swapocalypse server crashes on startup – what to do?
Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.4). You can switch loaders with one click in the panel.
Is Swapocalypse compatible with datapack and fabric and forge and neoforge and quilt?
Swapocalypse officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 1.21.4, 1.21.3, 1.21.2. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Swapocalypse – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Swapocalypse consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install Swapocalypse with just one click on your server.