← Back to directory

Minecraft Classic Theta

A performance-tuned voxel sandbox with smarter NPCs, refined physics, and flexible debug tooling.

Heads up: If the embed fails to load, jump directly into Minecraft Classic Theta in a separate tab. Open game in a new window

Gameplay overview

Training-world sandbox

Minecraft Classic Theta builds on Mojang's browser edition to create a focused testing ground for voxel systems. The v2.2 update introduces invisible containment walls that keep you and your NPC helpers inside the intended play space while preserving immersion. Use the expansion to prototype mechanics, profile performance, or simply experiment with block interactions in a frictionless environment.

Voxel landscape slice demonstrating Minecraft Classic Theta world boundaries and NPC builders
Stress-test map boundaries, NPC builders, and new physics tweaks in the open training world.

What's new in v2.2

Map boundaries system

The containment system deploys invisible barriers along map edges, keeping players and NPCs inside while still letting the landscape breathe. It's ideal for scenario design or classroom sessions where you don't want explorers falling into the void.

NPC block interaction fixes

Companion NPCs can now remove and place blocks reliably, complete with visual feedback. Toggle their behaviour with debug keys to watch training simulations unfold without manually rebuilding the world.

Physics refactor

Movement and collision use a centralized physics engine that shares logic between players and NPCs. The result is predictable motion you can trust when scripting interactions or testing custom mechanics.

Performance upgrades

Under-the-hood memory management and render pipeline tuning dramatically raise framerate, especially on low-power devices. The project is perfect for profiling WebGL voxel workloads.

Controls & debug tools

Core inputs

  • WASD: move around the world.
  • Space: jump.
  • E: interact with blocks.

Testing shortcuts

  • G: toggle NPC block interaction debugging.
  • V: exercise direct block manipulation routines.
  • B: spawn test blocks for quick experiments.

Pair the shortcuts with the containment system to run repeatable experiments without rebuilding your scene.

Tips for creators

Make the most of the sandbox

  • Use boundary walls to create guided lessons or safe demo zones for new players.
  • Trigger NPC block routines with G while recording to capture reliable training footage.
  • Profile framerate before and after large builds to see how the optimized renderer handles stress tests.

Frequently asked questions

Need a quick answer?

Q: Can I tweak the world settings?
A: Yes. In the downloadable build, edit TRAINING_WORLD_CONFIG.js to change spawn, environment, or NPC parameters.

Q: Is controller support available?
A: The project targets keyboard and mouse for now—ideal for testing lessons or quick prototypes.

Q: How do I host it myself?
A: Clone the repository, run npm install, and launch with npm start to serve it locally.