You will get AI-Powered NPCs & Smart Gameplay in Unity (ChatGPT, OpenAI, LLM)
Top Rated
Project details
I will integrate AI-powered systems into your Unity game — from intelligent NPCs that hold real conversations to procedural content that adapts to each player.
I am Riken, a Senior Unity Developer with 150+ shipped titles. I specialize in connecting LLMs (OpenAI, Gemini, Claude) to Unity game logic so your NPCs feel alive.
✅ What I can build: • Conversational AI NPCs: Characters that talk, react & remember using ChatGPT/OpenAI. • Dynamic Dialogue: Branching conversations generated in real-time, not from scripts. • Procedural Content: AI-generated levels, quests, or item descriptions. • Adaptive Difficulty: Game reads player skill and adjusts in real-time. • AI Companions: Smart allies that learn player behavior.
🛠 Tech: OpenAI API, Gemini API, Unity C#, Inworld AI, Convai, Vector Databases.
💡 Use Cases: RPGs, Educational Sims, Training Apps, Interactive Fiction, Open-World Games.
This is cutting-edge work. Message me with your concept first.
I am Riken, a Senior Unity Developer with 150+ shipped titles. I specialize in connecting LLMs (OpenAI, Gemini, Claude) to Unity game logic so your NPCs feel alive.
✅ What I can build: • Conversational AI NPCs: Characters that talk, react & remember using ChatGPT/OpenAI. • Dynamic Dialogue: Branching conversations generated in real-time, not from scripts. • Procedural Content: AI-generated levels, quests, or item descriptions. • Adaptive Difficulty: Game reads player skill and adjusts in real-time. • AI Companions: Smart allies that learn player behavior.
🛠 Tech: OpenAI API, Gemini API, Unity C#, Inworld AI, Convai, Vector Databases.
💡 Use Cases: RPGs, Educational Sims, Training Apps, Interactive Fiction, Open-World Games.
This is cutting-edge work. Message me with your concept first.
Game Type
3DGame Engine
UnityPlatform Type
PC, Mobile DeviceGenre
Action, Adventure, Role Playing, Educational, Simulation, StrategyPlugins
Analytics, Social, Utilities, Chat, Machine LearningWhat's included
| Service Tiers |
Starter
$299
|
Standard
$799
|
Advanced
$1,999
|
|---|---|---|---|
| Delivery Time | 5 days | 14 days | 30 days |
Number of Revisions | 2 | 3 | 5 |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$99 - $399
Additional Revision
+$79Frequently asked questions
57 reviews
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yl
yann l.
Jul 6, 2026
Unreal 5.7 Developer with iOS Experience
Very good experience, Riken never stopped to satisfy us.
JM
Jacob M.
Jun 4, 2026
Unity XR Developer - ParelVR Client and SDK Foundation
Managed to do more and better on tasks that where asked.
SB
Sam B.
Mar 31, 2026
Optimize Mobile Game (IOS)
Working with Riken was amazing!
LM
Luke M.
Mar 28, 2026
Experienced Unity Developer Needed for Game Project
Riken did a great job, I had a quick deadline which he helped me achieve.
Easy to work with patient with the timezone difference.
i will hire again for the next project.
Easy to work with patient with the timezone difference.
i will hire again for the next project.
RC
Raymond Fils C.
Mar 13, 2026
VR Training Platform Development for Regulated Industries
Riken helped us build the Phase 1 foundation of our Unity VR training platform (LRT Brain) targeting Meta Quest and desktop environments.
He delivered a reusable architecture with XR Interaction Toolkit, modular interaction systems, data-driven task logic, and a clean project structure that allows our team to extend the platform for future training modules.
Riken was responsive, cooperative during validation and debugging, and provided the final repository, documentation, and builds required for handoff.
Overall a good collaboration and a solid technical foundation for our platform. I would recommend Riken for Unity / VR development projects.
He delivered a reusable architecture with XR Interaction Toolkit, modular interaction systems, data-driven task logic, and a clean project structure that allows our team to extend the platform for future training modules.
Riken was responsive, cooperative during validation and debugging, and provided the final repository, documentation, and builds required for handoff.
Overall a good collaboration and a solid technical foundation for our platform. I would recommend Riken for Unity / VR development projects.
About Riken
Unity Game Developer | Mobile, PC, VR | Multiplayer | 2D & 3D Games
99%
Job Success
Surat, India - 8:55 pm local time
I'm a senior unity developer and unity 3d developer with 9+ years in unity software development and unity video game development. I've built over 150 games and interactive apps. 75+ of those projects were completed right here on Upwork — all with a 100% Job Success score and zero disputes. Mobile games, PC games, VR experiences, AR apps, multiplayer systems — I've shipped them all.
Clients hire me for two reasons: I write clean code and I communicate clearly. No ghosting, no surprises, no messy handoffs. You get daily updates, fast responses, and a game that works exactly how you need it to.
Whether you want to hire a unity game developer or need complete unity game development services — I deliver.
🎯 What I Build:
📱 Mobile Game Development (iOS & Android)
Complete game development using unity from concept to cross-platform publishing. Gameplay, UI/UX implementation, animations, particle effects, and polished interfaces. I optimize for performance so your mobile game runs smooth on lower-end devices. Unity 2d game development and unity 3d game development — I handle both.
I integrate monetization systems including AdMob, Unity Ads, AppLovin, and IronSource. In-App Purchases with server-side validation. Firebase Analytics and GameAnalytics connected from day one.
🖥️ PC & Video Game Development (Steam, Windows, Mac, Linux)
Full Steamworks SDK integration — achievements, cloud saves, leaderboards, matchmaking, and overlay. URP and HDRP rendering pipelines, shader programming and visual effects for a professional look.
🥽 VR Game Development (Meta Quest, SteamVR, HTC Vive)
Dedicated vr ar developer and meta quest developer. Vr game development unity and virtual reality game development — XR Interaction Toolkit, hand tracking, grab mechanics, teleportation, spatial audio, haptic feedback. I build immersive interactions that feel natural. Vr application development and vr app development for standalone and PCVR, 90fps optimization where every draw call counts. Virtual reality software development for training, simulation, and real-time 3D visualization.
📲 AR App Development (ARCore, ARKit)
Experienced ar developer for ar app development and ar mobile app development. I build augmented reality apps for product visualization, interactive marketing, and education. Surface detection, object placement, image tracking, face tracking. I deliver ar vr app development services, augmented reality app development services, and ar development services for businesses across retail, real estate, healthcare, and education.
🌐 Multiplayer Game Development
Online multiplayer using Photon (PUN2/Fusion), Mirror, Netcode for GameObjects, and custom WebSocket backends. Lobbies, matchmaking, chat, state sync, client-side prediction, lag compensation. Multiplatform game development that works reliably at scale.
🌍 WebGL & Browser Games
WebGL game developer — browser-based games optimized for smooth gameplay without plugins.
⚡ Where I Stand Out:
⚡ Performance Optimization
My strongest skill. Unity Profiler, Memory Profiler, Frame Debugger, GPU Profiler. I fix overdraw, optimize shaders, implement object pooling, reduce draw calls, and eliminate GC pressure. Games from unplayable to smooth 60fps with documented results.
🔧 Bug Fixing & Project Rescue
Many clients hire me after a bad experience. I read unfamiliar codebases quickly, fix critical bugs, and clean up architecture so your project has a future.
🛠️ Custom Game Systems
Inventory, save/load, character controllers, dialogue systems, AI behavior trees, state machines, level editors, and custom editor tools. Full c# game development — reusable modules your team can maintain.
☁️ Backend Integration
Firebase, PlayFab, or custom REST APIs for authentication, cloud saves, leaderboards, push notifications, remote config, A/B testing, and IAP validation.
⭐ What Clients Say:
"Highly understanding with feedback. Works in a timely fashion. Great work!" — Epoxy Studios, Canada
"Fantastic developer. We'll use him again for future projects!" — Random Logic Games, US
"Very professional. Will definitely collaborate again." — Kob Games
🎮 Games Built: Hyper-casual, puzzle, RPG, action, simulation, educational, endless runner, card, board, trivia, tower defense, racing, sports, fighting, idle/clicker, match-3, platformer, survival, horror, sandbox
🏢 Industries: Gaming studios, EdTech, healthcare, real estate (AR), retail (AR product viz), entertainment, fitness, training/simulation, marketing agencies
🔩 Tech: Unity 2D/3D (9+ yrs) | C# | Shader Graph | URP/HDRP | Photon PUN 2/Fusion | Mirror | Netcode | XR Interaction Toolkit | ARCore | ARKit | Firebase | PlayFab | REST APIs | AdMob | Unity Ads | AppLovin | Git | SOLID | Design Patterns
📩 Send me your project details. I respond within a couple of hours.
Steps for completing your project
After purchasing the project, send requirements so Riken can start the project.
Delivery time starts when Riken receives requirements from you.
Riken works on your project following the steps below.
Revisions may occur after the delivery date.
AI Architecture & Prompt Design
I analyze your game and design the NPC personality prompts. I set up the OpenAI/Gemini API connection, build the C# communication layer, and deliver a working grey-box prototype where you can chat with the NPC in-engine.
Integration & Dialogue System
I wire AI responses into your game's dialogue UI. I add memory and context systems so NPCs remember past conversations. I script NPC behaviors (e.g., "give quest if player asks about treasure"). Includes save/load state.