FTB OceanBlock modpack Minecraft server

FTB OceanBlock is a Feed The Beast questing pack for Minecraft 1.16.5 on Forge, set among infinite oceans with custom structures in the deep. Its page counts more than 550 quests. The Modpacks tab can install its server from Feed The Beast's own source.

Checked against FTB OceanBlock 1.16.3 on Forge 36.2.39 and Minecraft 1.16.5, October 2026.

OceanBlock or OceanBlock 2

Feed The Beast lists two packs with this name, and a search for OceanBlock returns both. FTB OceanBlock is the Minecraft 1.16.5 Forge pack this guide covers. FTB OceanBlock 2 is a separate pack on Minecraft 1.21.1 with NeoForge and Java 21, and its steps differ. Check the Minecraft version on the row before you press Install.

What the pack needs

• Minecraft 1.16.5, Forge 36.2.39 and Java 8. These are the targets Feed The Beast lists for 1.16.3, the newest release. The panel picks Java 8 for any Minecraft version below 1.17.
• At least 4 GB of RAM, 6 GB recommended. The pack's page lists both figures. Compare them with your plan using how much RAM a Minecraft server needs and the Minecraft plans.
• The same version for players. They install FTB OceanBlock 1.16.3 from the FTB App, Feed The Beast's launcher.

Install from the Feed The Beast source

On the Modpacks tab, press the Feed The Beast chip and search for OceanBlock. Searches need at least three letters. If there is no Feed The Beast button, that source is not available on your account yet, and this route does not apply until it is. Press Install on the row for Minecraft 1.16.5 named FTB OceanBlock, not FTB OceanBlock 2. For a fresh start leave Keep my world, settings and player lists unticked. If the window shows a note about your world in place of that tickbox, your world was saved by a newer Minecraft than this pack can open, so it is not kept, and your current world goes into the backup. The backup and the rest of the window are in Install an FTB modpack.

When the install finishes, the pack's server files are in place and a few client-only mods are turned off for you.

The level-type line

The pack's page says "For servers: level-type=default". After the install and first start, open server.properties in File Manager and check that the line reads level-type=default. It does on a fresh install, so there is nothing to change. Do not pick a value from the World type list in Config Editor for this pack. The list offers newer names such as Normal and Superflat, and those are not the value the pack asks for.

First start

Press Start on the Console if you did not tick the start box. The pack starts on Java 8 with Forge 36.2.39.

Common problems

• A player cannot join. Check they run FTB OceanBlock 1.16.3 on Minecraft 1.16.5. Join a modded server from your launcher has the steps.
• The install stops part way. The tab shows "The last install didn't finish" with Show install log and Retry install.
• The server crashes at boot. Find and read a crash report shows how to name the mod at fault.