Mantramon XR

Mantramon
Mantramon
Mantramon
Mantramon
VR Infinite Runner
VR Battles
Booster Pack TCG
VR Gym Training
AR Realtime Battles
AR Realtime Battles
Turn-Based AR Battles
Turn-Based AR Battles
AR Gym Training
AR Racing
AI Chatting with Mantramon

Inspiration

Mantramon XR was inspired by the idea that mixed reality should feel alive and creature collectors are the best way to show that. I wanted to create a world where intelligent creatures step into your room, interact with in real world, and then follow you into immersive VR arenas.

With Passthrough, Scene Understanding, Hand Tracking, and Spatial Anchors now available on Quest devices, it finally became possible to build a unified cross-reality game: part MR, part VR, all seamless.

The goal was to create something fun, accessible, and technically ambitious a project that shows why the future of games is mixed reality. It's easy to pick up, hard to put down.

What it does

Mantramon XR is a mixed reality + virtual reality creature collector, battler and racer for Meta Quest.

Players draft AI creatures into their real environment, run to collect coins. Race and battle your friends after you've trained them up. Then you can switch instantly to full VR when they want deeper immersion.

Core features

MR Battles using Passthrough + Scene Understanding
VR Arenas with 3D immersion
Fun Run–style MR Racing mapped to the player's space
Leveling and Gear customizing your Mantramon loadout.
AI-driven Mantramon creatures that you can actually chat with in game.
Multiplayer: real-time MR races with humans or bots.

How we built it

Mantramon XR is built in Unity using:

Passthrough API for mixed-reality visuals
Scene Understanding to detect floors, walls, and surfaces
Spatial Anchors for stable, persistent placement
Meta Spatial SDK for physics, collisions, and spatial audio
Photon Fusion for multiplayer races
Immersive Reality to build MR arenas and racetracks that adapt to any room size

Our pipeline was optimized for Quest 3’s improved passthrough fidelity.

Challenges we ran into

Combining MR and VR into a seamless unified experience
Making it work cross platform
Stabilizing Spatial Anchors across MR environments
Designing controls that work equally well with hands or controllers
Ensuring MR racetracks remain fun regardless of real room shape
Maintaining comfort while supporting fast gameplay easy to learn gameplay
Making AI creatures that can chat with AI
Making it fun in single or multiplayer modes.

Each challenge pushed us to refine our systems and user interaction design.

Accomplishments that we're proud of

A complete MR + VR hybrid game loop
Stable anchored MR arenas that adapt to real environments
Intuitive gameplay
AI-driven creatures with dynamic responses
MR Fun Run–style racing mode and Subway Surfer style infinate runner mode.
Multiplayer support (live races + ghost battles)
All development completed self-funded

What we learned

MR design must prioritize the player's real environment and comfort
Gameplay and tracking must be simple and intuitive to feel magical
MR and VR should complement each other, and both equally feel immersive
Comfort optimization influences almost every design decision

What's next for Mantramon XR

Additional MR racing biomes and seasonal events
Deeper integration and bug fixes
New Mantramon classes with deeper behaviors
Voice Interaction
Social MR + VR hangout spaces
Better AI-driven adaptive difficulty
Visual upgrades tailored for Quest 3
Preparing the project for Meta Horizon Store submission

Mantramon XR will continue evolving into a flagship cross-reality title that proves how MR, VR, AI creatures, and spatial design can work together to create something truly new.