Alpha Playtest 0.1.1

This description will be updated as the pack develops.

Advent of Chaos is a modern expert-style modpack for NeoForge 1.21.1, combining Tech, RPG, and Magic into a deep, structured progression experience.

The pack is built around a 10 chapter progression system where each chapter gates access to new dimensions, mechanics, and machines. Forget punching your way to endgame, every major milestone requires you to master what came before it.

Current alpha content includes:

Chapter 1: basic exploration, early tech (Synergy, Metalworks, JustDireThings ...), ProjectE, etc...
Chapter 2: early-mid tech (ImmersiveEngineering, Powah, AE2, Actually Additions ...), RPG, magic etc...

Known alpha limitations:

Some planned mods are not yet available for 1.21.1 and will be added in future updates.
Quest content is partial, full chains, rewards and descriptions/tiltes will be added in future updates.
Not everything works perfectly yet. That's why it's a playtest.

Bugs and unexpected behaviour are to be expected, report them, they help!

Report bugs here: Discord

Tested on Java 21 and Java 25 with 8GB RAM.

Reccommended JVM Arguments for Java 25:

-XX:+UseG1GC -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+ParallelRefProcEnabled -XX:+PerfDisableSharedMem -XX:+UseStringDeduplication -XX:MaxGCPauseMillis=200 -XX:G1HeapRegionSize=16M -XX:G1NewSizePercent=23 -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=20 -XX:G1MixedGCCountTarget=3 -XX:InitiatingHeapOccupancyPercent=15 -XX:SurvivorRatio=32 -XX:MaxTenuringThreshold=1 -XX:ReservedCodeCacheSize=400M -XX:+UseCompactObjectHeaders

Advent of Chaos

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