// modpack server guide
Isle of Berk (Claws of Berk) server hosting & setup guide
An Isle of Berk (Claws of Berk) server needs Java 17 and about 5.5–7.5 GB of RAM for up to 15 players.
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Summary from Isle of Berk (Claws of Berk) on Modrinth.
Isle of Berk (Claws of Berk) is a Forge modpack for Minecraft 1.18.2 with 140 mods, 112 of which run on the server. We'd pick our Premium plan (8 GB) for it.
Quick facts
| Loader | Forge |
|---|---|
| Minecraft versions | 1.18.2 |
| Java needed | Java 17 for Minecraft 1.18.2 Java version chart. |
| Mods | 112 run on the server140 in the pack. The other 28 are client-only, and the server skips them. |
| RAM | About 4–4.5 GB for 1–3 playersBy player count. |
| Downloads | 402,353 on Modrinth |
| Last updated | September 24, 2026 (version 3.2.5) |
| First published | April 27, 2024 on Modrinth |
| Server support | Required: the pack has mods that must run on the server. |
| Server pack | ClawsOfBerk+Server-[3.2.5].zipOfficial server pack on CurseForge, for ClawsOfBerk-[3.2.5], the same version Modrinth has. Checked October 5, 2026. |
| Modrinth tags | adventure, combat |
Isle of Berk (Claws of Berk) server files
Yes, on CurseForge. Modrinth has no separate server pack for Isle of Berk (Claws of Berk), but the authors publish one on CurseForge: ClawsOfBerk+Server-[3.2.5].zip, for ClawsOfBerk-[3.2.5] (September 24, 2026). That's the same version Modrinth has.
How much RAM does an Isle of Berk (Claws of Berk) server need?
| Players online | RAM | DSN plan |
|---|---|---|
| 1–3 players | About 4–4.5 GB | Premium (8 GB)Standard (4 GB) can do if players stay close. |
| 4–8 players | About 4.5–6 GB | Premium (8 GB) |
| 9–15 players | About 5.5–7.5 GB | Premium (8 GB) |
Estimated from 112 mods on the server with our RAM calculator, not measured: low end if players stay together, high end if they spread out.
Set Java's heap (-Xmx) 10–15% under the RAM you have, about -Xmx7000M on 8 GB. Forge 1.18.2 reads it from user_jvm_args.txt: uncomment the -Xmx line. RAM guide.
Isle of Berk (Claws of Berk) server requirements
| Java | Java 17 |
|---|---|
| Loader | Forge for Minecraft 1.18.2 |
| CPU | Fast single-core speed (one main thread). |
| RAM | About 4–7.5 GB for 1–15 players (table above) |
| Disk | The server files, a growing world and backups |
| Network | TCP port 25565 open to players |
Recommended plan
Our pick for Isle of Berk (Claws of Berk)
Premium
8 GB RAM · planned launch price $30/month
At about 112 Forge mods this is a mid-size pack, and 8 GB gives it room for the mods plus the chunks your players load.
Ordering is closed until we relaunch. We aren't taking orders or payments while we move to new hardware. Join the launch list and we'll email you when Premium servers open.
More than 15 players, or lots exploring at once? Go up to Heavy (12 GB). Not sure? Email hello@dsnservers.com.
Planned launch price in USD, billed monthly once ordering opens, with a 7-day refund window.
How to make an Isle of Berk (Claws of Berk) server on your own PC
What's specific to Isle of Berk (Claws of Berk), step by step. The full walkthrough for any pack: how to make a modded Minecraft server.
- Install Java 17.
Check with
java -version. Java version chart. - Get the server files.
Download the official server pack,
ClawsOfBerk+Server-[3.2.5].zip, from CurseForge and unzip it into an empty folder. - Start it and accept the EULA.
Run the start script in the server files, or the
run.sh/run.batthe Forge 1.18.2 installer writes, then seteula=trueineula.txtif you accept Mojang's EULA (EULA step). - Set the RAM with
-Xmx, sized from the table above. - Let friends connect: forward TCP 25565, or use a tunnel or host behind CGNAT (can't connect?).
Or run Isle of Berk (Claws of Berk) on DSN
Once we relaunch (join the launch list), on DSN you'd install Isle of Berk (Claws of Berk) from the panel's Modrinth modpack installer (version 3.2.5), pick Java 17 on the Startup tab and accept the EULA in the console. No port forwarding.
How to play Isle of Berk (Claws of Berk) with friends
Each player installs Isle of Berk (Claws of Berk) version 3.2.5 with the Modrinth App or Prism Launcher, the same version as the server, and adds the server's address under Multiplayer.
Different versions of Isle of Berk (Claws of Berk) on the server and a client show up as Mismatched mod channel list or mod rejections. Why friends can't join, timeouts included.
Lag and performance on Isle of Berk (Claws of Berk)
Can't keep up! Is the server overloaded? means ticks take longer than 50 ms; more RAM won't fix that once Isle of Berk (Claws of Berk) has enough (tick lag guide). For Isle of Berk (Claws of Berk):
- Measure first: spark's
/spark tpsand profiler work on 1.18.2 and name the mod or machine using the tick time. - Distances:
view-distance=8and a lowersimulation-distanceinserver.properties. - Pre-generate: Chunky for 1.18.2,
/chunky radius 3000then/chunky start, before people explore.
Common Isle of Berk (Claws of Berk) crashes
What a Forge 1.18.2 server running Isle of Berk (Claws of Berk) hits most. For any other error, paste the log into the free crash log analyzer.
- Wrong Java version. Isle of Berk (Claws of Berk) on Minecraft 1.18.2 needs Java 17. Started on Java 8, it stops with
UnsupportedClassVersionError: ... class file version 61.0, this version of the Java Runtime only recognizes class file versions up to 52.0. Java version fix. - Out of memory. Isle of Berk (Claws of Berk) (112 mods on the server) needs about 4–4.5 GB for 1–3 players;
java.lang.OutOfMemoryErrormeans it ran out. Out-of-memory fix. - Client-only mod on the server. Isle of Berk (Claws of Berk) includes 28 client-only mods, which a server install skips; copying a player's mods folder brings them back and stops the server. Check a mods list with the client-or-server-side checker. Client-only mod fix.
- After adding or updating a mod. Mods you add to Isle of Berk (Claws of Berk) by hand usually crash it with a missing dependency or a mixin conflict.
- Ticking entity or block entity. The crash report names it and gives its coordinates. Ticking entity fix.
Updates and support
Before moving Isle of Berk (Claws of Berk) past version 3.2.5, back up the world: see updating a modpack server without losing your world.
Bugs in Isle of Berk (Claws of Berk) itself go to its authors: Discord. Server problems on DSN: hello@dsnservers.com or Discord.
Packs like Isle of Berk (Claws of Berk)
More: all modpack guides and how to make a modded server.
Run Isle of Berk (Claws of Berk) on DSN when we relaunch.
Our pick, Premium: 8 GB, planned at $30/month.
DSN Servers isn't affiliated with Isle of Berk (Claws of Berk) or Modrinth. The pack's name, icon, summary and stats come from Modrinth's public API (checked October 4, 2026).