About Poseidon
From HangarShipwrecked and stranded underwater. Breathe, build, and survive in a fully aquatic island world.
🌊 Poseidon
Poseidon is an immersive underwater survival experience for Minecraft. Stranded after a mysterious shipwreck, you awaken with the uncanny ability to breathe underwater—but there's a catch. Like a shark, you must keep moving to survive.
Welcome to a world where the ocean is both your sanctuary and your greatest threat. From deep-sea ruins to glowing coral cities, Poseidon challenges you to survive, build, and explore in a realm where the sea is your only constant—until you dare to set foot on the dreaded, burning land above.
🐚 Features
- 🧭 Survival Reimagined: Keep moving to stay alive. Stillness invites danger.
- 🏰 Underwater Realm Building: Construct coral-covered castles and aquatic cities in the deep.
- ⚔️ Challenging Encounters: Face relentless drowned, sea monsters, and secrets buried beneath.
- 🌋 The Water-Filled Nether: Discover a submerged version of the underworld.
- 📖 Lore-Driven Challenges: Complete multi-level quests and unlock mysterious books that expand Poseidon's world.
- 🏝️ Custom Starter Islands: Choose your beginning—simple shipwreck, small monument, or a grand coral-laced domain.
🔧 Setup Instructions
> Recommended: Install alongside the BentoBox Challenges Addon for full Poseidon functionality.
- Download and install the Poseidon addon.
- Place it in your
/plugins/BentoBox/addons/folder. - Start your server – new worlds for Poseidon will be generated automatically.
- Let pre-generation run. It only works when no players are online. The more chunks that are pre-generated, the better the performance.
- Log in and configure challenges:
- Use
/padmin challenges - Click the 🕸️ web icon to download the Poseidon Challenges
- Choose a starting island:
- Shipwreck with coral
- Shipwreck with a small monument
- Shipwreck with both small and large monuments
- Customize islands using
/padmin bp
- (Optional) Tweak
config.ymlor use the admin settings GUI.
- Major changes may require deleting the database and resetting worlds.
Game command
The default game command is /poseidon or /po for short. The admin command is /padmin.
⚠️ Notes
- The End world is currently underdeveloped.
- Lag may occur if islands are not pre-generated. Allow pre-gen to complete before inviting players.
✅ Compatibility
| Feature | Supported | |---------------------|------------------------------------| | Minecraft Version | ✅ 1.21.4+ (not compatible with older versions) | | BentoBox Version | ✅ 3.3.0 or later | | Java Version | ✅ Java 21 |
💬 Community & Feedback
Join the BentoBox community on Discord or contribute via GitHub Issues. Share your experiences, report bugs, or suggest new features!
Poseidon is part of the BentoBox ecosystem. Dive in, keep moving, and discover what lies beneath. 🌊🐠
Highlights
From source dataGame versions
Supports 8 Minecraft versions, the newest being 1.21.9.
Loaders
Runs on Paper.
Footprint
Rated a light load on a server.
Poseidon on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers, for Paper servers. We download it from Hangar, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Paper
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.1.0, released 2025-08-03
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Paper | 1.21 to 1.21.11 (8 versions) | 1.21.11 |
From 1 recorded build of Poseidon.
Dependencies
- Required: BentoBox (hangar, not in our catalogue)
- Required: Challenges-For-BentoBox (hangar, not in our catalogue)
Declared by the newest build that lists any. Required ones are installed with it on one-click installs.
Run Poseidon on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogMaps & scenarios
Custom maps, arenas and scenarios to play on.
Runs on your server
From source side supportHangar lists Poseidon as required on the server. Check its Hangar page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- Paper
- Runs on
- Serverrequired on the server
- Game versions
- 1.21.9 and 7 earlier
- Requires
- One-click install needs a Paper server.
Verified at the source
- ✓HangarOfficial listing, checked 2026-10-01Open ↗
- ✓AuthorBentoboxWorld, as published on Hangar
- ✓LicenseEPL-2.0Free










