XR · Spatial Computing · Game Development

Engineering experiences people can step inside.

I'm an XR & game developer and Co-Founder / CTO of Relu Interactives. I've pioneered immersive technology in Africa since 2016. I build VR training simulators, digital twins, multiplayer 3D, Unity games, and the WebXR engine behind Relu Spatial.

Portrait of Caleb Mantey
Caleb Mantey Co-Founder & CTO · Relu Interactives
2016
Pioneering XR in Africa
2×
National innovation awards
5
Universities using PetSim
10+
Immersive products shipped
Selected XR work

From training rigs to VR games

These span technical training, national-infrastructure digital twins, and entertainment. In each one, you handle the equipment, walk the site, or play the scene in 3D.

Award-winning · Training simulation

PetSim

An interactive petroleum drilling-rig simulation where engineering students rehearse real rig operations, free to every student in Ghana. Five universities endorse it, and it anchored Relu's 2023 NEIP Presidential Pitch win.

Unity & C#Mixed RealityMeta QuestSimulation
Watch the PetSim demo ↗
Digital Twin
Enterprise · GNPC / Ghana Gas

VIVaTS

Operator training and live plant monitoring for national gas infrastructure, built as a working digital twin of real industrial assets.

View case study ↗
3D / Real-time
Industrial · Digital Twins

Live Digital Twins

Interactive 3D replicas of plant and equipment, built from engineering drawings for visualization, monitoring, and analysis.

See the work ↗
Mixed Reality
XR headset · Hand tracking

PetSim MR

PetSim's mixed-reality build runs on its own on an XR headset. You open the menu by looking at your palm, select with a finger tap, and inspect rig parts placed in your own room.

Watch the demo ↗
VR · Storytelling
Studios · with Leti Arts

Africa's Legends VR

An immersive VR adaptation of African superhero storytelling, built as a Relu Interactives × Leti Arts collaboration.

View case study ↗
VR Game
Studios · VR Game

SortJam VR

A physics-based VR sorting adventure built around object interaction, timed challenges, and progression through themed worlds.

View case study ↗
Brand VRCoca-Cola VR soccer shootout
Brand Experience · HTC Vive

Coca-Cola VR Soccer

A virtual penalty shootout with realistic physics and leaderboards. More than 500 people played it at live brand activations.

Watch the experience ↗
Social VRMulti-user virtual exhibition platform
Multi-user · Networking

Virtual Exhibition

A multi-user VR space with real-time collaboration, shared interactions, and voice. It grew out of my R&D into networked, social 3D presence.

Explore project ↗
AR
Augmented Reality

AR Experiences

Markerless AR placement, brand activations, and spatial overlays. You see interactive 3D placed in the room through your phone.

See the work ↗
Flagship · AI + WebXR
Platform · Lead Engineer

Relu Spatial

Our browser-native WebXR platform. You type a prompt and play the result in seconds. I built its core systems, from the backend to the XR engine.

Visit Relu Spatial ↗
Playable

Games & interactive demos

A few things you can play right now. More of my game and XR work lives on itch.io, and plenty of undocumented builds are still waiting to be recorded.

Real gameplay
A game I built · Free in your browser

Akofena: Blades of the Ancestors

Fight as the legends of Africa.

Yaa Asantewaa, Shaka, Shango, Kwaku Ananse and 15 more, each with their own weapons, home ground, and Legend Art. It runs on your phone, tablet, or computer with nothing to download.

Built with three.js and TypeScript, with rollback netcode over WebRTC.

  • 19Legends
  • 17Home stages
  • 1v1Online
  • 2POn one screen

I teach game development, too

I publish hands-on Unity tutorials on YouTube. My current series builds a third-person bow and arrow system in Unity, one mechanic at a time.

Watch the series ↗
Founder & builder

Leading engineering at Relu Interactives

I co-founded Relu Interactives in Ghana and lead the engineering behind its immersive products. I set technical direction, build core systems, work alongside artists and designers, and take products from prototype to delivery.

Relu Spatial is the clearest example: I built the platform's backend and XR engine. It now supports AI-assisted 3D creation, AR and VR experiences, a desktop editor, and publishing across devices.

Unity & C#WebXRThree.jsVR / AR / MR Meta Quest / OpenXRMultiplayer 3DDigital twins BlenderGIS & spatial dataTechnical leadership
Relu Spatial · AR scanning, try-on, and image tracking in the browser
Work used & endorsed by KNUST UMaT UENR TTU ANU Society of Petroleum Engineers Ghana National Gas
Recognition

Awards earned while building Relu

National recognition for the immersive technology our team builds.

NEIP Presidential Pitch award
2023 · National award

NEIP Presidential Pitch, Overall Winner

Relu's petroleum-engineering simulation (PetSim) won Ghana's Presidential Pitch competition.

Read the award story ↗
Ghana Innovation and Startup Award
2023 · Startup award

Animation/Gaming Startup Innovation of the Year

Relu Interactives won this category at the Ghana Innovation & Startup Awards.

See award coverage ↗
Experience

Built and led in XR

Co-Founder & CTO · Relu Interactives

2022–Present

Lead Relu Spatial engineering across backend services, the XR engine, and cross-device creation & publishing; direct immersive training, games, and digital-twin products.

Web 3D & Game Projects · Andela

2021–2024

Built and ported browser-based 3D games and XR prototypes for client teams; integrated gameplay with backend services.

AR / VR Developer & Researcher · Soko Aerial

2019–2020

Prototyped Unity-based VR/AR experiences for military training and spatial awareness; mentored junior developers.

Work together

Work with me on your XR or 3D product

I can shape the technical approach, build the experience, and lead delivery from prototype to production.

Also see: Full portfolio (all skills) · Software & AI Engineering →