Building an FPS Multiplayer Game in Unity with Photon PUN

Creating a multiplayer first-person shooter (FPS) is a challenging yet rewarding experience, especially when handling networking, real-time interactions, and player damage synchronization. As part of my solo college assignment, I developed a basic FPS multiplayer game using Unity and Photon PUN, focusing on smooth player movement, shooting mechanics, and a functional damage system.

Project Overview

This project serves as a tech demo to demonstrate core multiplayer functionality. The primary goal was to create an online FPS where players can connect, move, shoot, and take damage in real time. While it’s a simple implementation, it lays the foundation for a fully-fledged multiplayer shooter.

Key Features

🔹 Multiplayer Gameplay – Real-time player interactions using Photon PUN, allowing seamless online matches.
🔹 Player Damage System – A fully functional hit detection and health system, ensuring accurate combat.
🔹 Smooth Networking – Implemented position synchronization and optimized latency handling for better gameplay.
🔹 Unity & C# Development – Designed and coded from scratch, utilizing Photon’s networking architecture.

Development Challenges & Solutions

1. Synchronizing Player Movement & Actions

One of the biggest challenges in multiplayer game development is keeping player actions synchronized across all connected clients. Photon PUN simplifies this by providing RPC (Remote Procedure Calls) and network variables, allowing real-time updates.

2. Implementing a Responsive Damage System

Handling player health and damage calculations over the network requires careful management of authoritative data. I ensured that only the correct player instance updates health values, preventing inconsistencies in damage calculations.

3. Lag Compensation & Performance Optimization

To minimize network latency, Photon’s interpolation and prediction techniques were utilized, ensuring smoother movement and hit detection even with slight lag.

Future Enhancements

While this project serves as a basic multiplayer framework, there are several improvements I plan to make:
✔️ Implementing weapon variety and ammo mechanics
✔️ Adding UI elements like health bars and kill feeds
✔️ Enhancing player animations for better immersion
✔️ Expanding the game with matchmaking and team-based modes

Final Thoughts

Developing this solo college project was a great learning experience, providing hands-on exposure to multiplayer game development in Unity. Photon PUN proved to be a powerful tool for handling networking efficiently. While this is just a small step, it opens up possibilities for building larger-scale multiplayer games in the future.