// modpack server guide

Lucky Block Challenge server hosting & setup guide

A Lucky Block Challenge server needs Java 21 and about 2.5–4 GB of RAM for up to 15 players.

Lucky Block Challenge!, Lucky Blocks, Lucky OneBlock, Lucky Race, Lucky Games, Lucky Pillars and more!

Summary from Lucky Block Challenge on Modrinth.

By DSN Servers · Updated October 2026 · NeoForge and Forge · Minecraft 1.21.1 · Java Edition

Lucky Block Challenge is a NeoForge and Forge modpack for Minecraft 1.21.1 (older versions go back to 1.16.5) with 29 mods, 15 of which run on the server. We'd pick our Standard plan (4 GB) for it.

Quick facts

Loader	NeoForge and Forge
Minecraft versions	1.21.1, 1.16.5
Java needed	Java 21 for Minecraft 1.21.1Older pack versions: Java 8 for 1.16.5. Java version chart.
Mods	15 run on the server29 in the pack. The other 14 are client-only, and the server skips them.
RAM	About 2–2.5 GB for 1–3 playersBy player count.
Downloads	332,915 on Modrinth
Last updated	October 2, 2026 (version 2.1.0)
First published	September 10, 2023 on Modrinth
Server support	Required: the pack has mods that must run on the server.
Server pack	LuckyBlockChallenge+Server-[2.1.0].zipOfficial server pack on CurseForge, for LuckyBlockChallenge-[2.1.0], the same version Modrinth has. Checked October 5, 2026.
Modrinth tags	adventure, combat, lightweight

Lucky Block Challenge server files

Yes, on CurseForge. Modrinth has no separate server pack for Lucky Block Challenge, but the authors publish one on CurseForge: LuckyBlockChallenge+Server-[2.1.0].zip, for LuckyBlockChallenge-[2.1.0] (October 2, 2026). That's the same version Modrinth has.

How much RAM does a Lucky Block Challenge server need?

Players online	RAM	DSN plan
1–3 players	About 2–2.5 GB	Standard (4 GB)
4–8 players	About 2–3 GB	Standard (4 GB)
9–15 players	About 2.5–4 GB	Standard (4 GB)

Estimated from 15 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 -Xmx3500M on 4 GB. NeoForge or Forge 1.21.1 reads it from user_jvm_args.txt: uncomment the -Xmx line. RAM guide.

Lucky Block Challenge server requirements

Java	Java 21
Loader	NeoForge or Forge for Minecraft 1.21.1
CPU	Fast single-core speed (one main thread).
RAM	About 2–4 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 Lucky Block Challenge

Standard

4 GB RAM · planned launch price $16/month

At about 15 mods this is a light pack, so 4 GB of RAM covers it for a small group.

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 Standard servers open.

Join the launch list Compare all plans

More than 15 players, or lots exploring at once? Go up to Premium (8 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 a Lucky Block Challenge server on your own PC

What's specific to Lucky Block Challenge, step by step. The full walkthrough for any pack: how to make a modded Minecraft server.

Install Java 21.
Check with java -version. Java version chart.
Get the server files.
Download the official server pack, LuckyBlockChallenge+Server-[2.1.0].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.bat the NeoForge or Forge 1.21.1 installer writes, then set eula=true in eula.txt if 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 Lucky Block Challenge on DSN

Once we relaunch (join the launch list), on DSN you'd install Lucky Block Challenge from the panel's Modrinth modpack installer (version 2.1.0), pick Java 21 on the Startup tab and accept the EULA in the console. No port forwarding.

How to play Lucky Block Challenge with friends

Each player installs Lucky Block Challenge version 2.1.0 with the Modrinth App or Prism Launcher, the same version as the server, and adds the server's address under Multiplayer.

Different versions of Lucky Block Challenge 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 Lucky Block Challenge

Can't keep up! Is the server overloaded? means ticks take longer than 50 ms; more RAM won't fix that once Lucky Block Challenge has enough (tick lag guide). For Lucky Block Challenge:

Measure first: spark's /spark tps and profiler work on 1.21.1 and name the mod or machine using the tick time.
Distances: view-distance=8 and a lower simulation-distance in server.properties.
Pre-generate: Chunky for 1.21.1, /chunky radius 3000 then /chunky start, before people explore.

Common Lucky Block Challenge crashes

What a NeoForge and Forge 1.21.1 server running Lucky Block Challenge hits most. For any other error, paste the log into the free crash log analyzer.

Wrong Java version. Lucky Block Challenge on Minecraft 1.21.1 needs Java 21. Started on Java 17, it stops with UnsupportedClassVersionError: ... class file version 65.0, this version of the Java Runtime only recognizes class file versions up to 61.0. Java version fix.
Out of memory. Lucky Block Challenge (15 mods on the server) needs about 2–2.5 GB for 1–3 players; java.lang.OutOfMemoryError means it ran out. Out-of-memory fix.
Client-only mod on the server. Lucky Block Challenge includes 14 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 Lucky Block Challenge 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 Lucky Block Challenge past version 2.1.0, back up the world: see updating a modpack server without losing your world.

Bugs in Lucky Block Challenge itself go to its authors: Discord. Server problems on DSN: hello@dsnservers.com or Discord.

More: NeoForge server hosting, all modpack guides and how to make a modded server.

Run Lucky Block Challenge on DSN when we relaunch.

Our pick, Standard: 4 GB, planned at $16/month.

Join the launch list

DSN Servers isn't affiliated with Lucky Block Challenge or Modrinth. The pack's name, icon, summary and stats come from Modrinth's public API (checked October 4, 2026).