Create a Complete Online Co-Op Multiplayer Game in Godot 4

Name: Create a Complete Online Co-Op Multiplayer Game in Godot 4
Rating: 4.8 (292 reviews)

Learn how to create a complete 2D online cooperative multiplayer game in Godot 4.4+!

Created byFirebelley Games

Last updated 7/2025

English

What you'll learn

Server-authoritative architecture for online multiplayer games using Godot’s high-level networking tools.
Remote Procedure Calls (RPCs) to synchronize game state across clients and the server.
MultiplayerSpawner and MultiplayerSynchronizer for scene tree and state synchronization.
Compose game scenes using modular components to create a flexible and maintainable project structure.
UI creation using Godot’s Control nodes and UI theming system.
Gameplay systems including a multiplayer lobby, multiplayer connections, combat, & more!

Course content

7 sections • 88 lectures • 18h 27m total length

Godot Setup and Orientation10:22
Creating a Basic Player Scene16:48
Create a basic player scene in Godot 4, with a physics body 2D, a sprite and collision shape, and explore scene trees and instancing for a multiplayer top-down twin-stick shooter.
Adding Basic Movement and Input Handling to the Player10:59
Laying the Groundwork for Multiplayer Connection15:47
Create a basic multiplayer groundwork by building a main menu with host and play buttons, wiring button signals in Godot to prepare for servers and clients.
Writing Our First Multiplayer Code17:11
Learn to set up a basic Godot 4 multiplayer connection by creating a host server and a join client, using port 3000 and localhost, and validating with peer IDs.
Basic State Synchronization and First RPC Call15:44
Replicating Players Across the Network12:29
Replicate a player instance for every connected peer using a custom multiplayer spawner and spawn function, naming each player by its peer ID for consistent RPCs across clients.
Input Authority20:20
Synchronizing Player Positions4:10
Display Configuration7:17
Adding Player Art6:40
Adding a Weapon to the Player18:54
Firing Bullets from the Weapon16:05
Synchronizing Bullets11:32
Creating Bullets at Proper Intervals12:08
Beginning Work on an Enemy4:21
Create a basic enemy in Godot 4 by adding an enemy scene under entities/enemy, using a character body 2D with a circle collision shape and a sprite.
Implementing Bullet Collision14:55
Implement basic bullet collision using area 2D with shapes, layers, and masks; detect with area entered signals, print collision, and free the bullet, with server-side authority in multiplayer.
Adding Basic Enemy Health & Synchronization7:23
Adding an Arena11:56
Import and center the arena asset, then lock it to preserve its position. Add static bodies with collision shapes to bound players, then spawn at the arena spawn marker.
Spawning Enemies18:07
Basic Enemy AI14:28
Adding Round Structure for Enemy Spawns9:01
Add a round structure for enemy spawns by implementing a round timer and an enemy spawn timer in the enemy manager, enabling wave-based rounds.
Creating a Health Component9:50
Global Signals and Advancing Rounds9:40
Hurtbox and Hitbox Components12:44
Making Enemies Damage The Player6:13
Addressing Warnings4:39

Y-Sorting5:11
Proper Weapon Rotation & Player Flipping10:33
Adding an Animated Background12:00
Create an animated background in Godot 4 using a texture region, repeat tiling, and a scrolling shader, then auto load the background across scenes for a cohesive look.
Creating a Weapon Animation13:58
Synchronizing Weapon Animations6:04
Synchronize weapon animations across clients by using an authoritative server to trigger visual effects via RPC calls, maintaining consistent node paths and scene structure.
Creating a Muzzle Flash Particle18:38
Develop muzzle flash particles for weapon firing in Godot 4 using GPU particles 2D, via a standalone muzzle flash scene with a four-frame texture and color ramp animation.
Spawning Muzzle Flashes In Game10:05
Adding a Visual Timer and Round Counter20:27
Synchronizing Round Timer19:14

Adding Hit Flash12:53
Adding Impact Particles11:46
Adding Persistent Ground Particles21:30
Create persistent ground particles with a gpu 2d system that trigger on enemy hits and deaths, using a sprite clip mask to render them in the arena background.
Adding Camera Shake19:26
Adding a Victory Condition4:44
Define max rounds as ten and trigger a victory condition by emitting a game completed signal after the tenth round to end the game for all players.

Button Theming & Main Menu15:47
Creating a Multiplayer Menu8:43
Enhancing Multiplayer Menu8:17
Making Multiplayer Settings Configurable11:44
Handling Connection Errors13:11
Showing Player Names In-Game15:27
Fixing Single-Player Bug2:58
Player Health UI14:29
Making Health UI Functional21:00
Fixing Player Name Bug1:31
Fix a player name bug by displaying a default player in single player mode and showing the proper player display name in multiplayer, using offline peer checks.
Creating a Pause Menu4:15
Making Pause Menu Functional24:58
Adding Ready-Up to Lobby18:21
Adding Ready-Up UI Part 114:09
Adding Ready-Up UI Part 219:02

Adding an Upgrade System with Custom Resources13:13
Synchronizing Upgrade Options to Clients14:44
Synchronize per-client upgrade options in Godot 4 co-op games by generating local upgrades for each connected player and broadcasting upgrade IDs via reliable RPCs, preserving server authority.
Allow Clients to Select Upgrades12:36
Fixing Client Upgrade Authority25:43
Synchronizing Upgrade Option State16:30
Making Upgrades Functional Part 117:33
Making Upgrades Functional Part 213:33
Advancing Rounds After Upgrading12:00
Adding Visuals to Upgrades27:44
Create upgrade visuals by adding new art, a color palette, and animated spawn, idle, and despawn sequences with particles and hit effects for multiplayer.
Showing Upgrade Tooltips17:50

Animations for Player and Enemy12:33
Adding Acceleration to Player Movement2:53
Tweaking Enemy Attack Behavior2:46
Tune enemy attack behavior in Godot 4 by auto triggering attacks when the player is within 16 pixels, avoiding jitter, and resetting the attack cooldown to intensify combat.
Preventing Bullets from Hitting Multiple Targets3:49
Adding Invulnerability After Taking Damage6:55
Player Damage Feedback6:35
Implement player damage feedback in a Godot 4 online co-op game by adding hit effects, blue ground particles, and camera shake limited to the controlling player.
Adding a Custom Mouse Cursor4:11
Adding Sound Effects21:32
Adding Music3:17
Creating an Options Menu21:52
Exporting the Game16:41
Connecting Over the Real Internet5:49
Congratulations and Further Areas of Exploration6:45
Explore advanced multiplayer enhancements for Godot 4, including Steam networking, client-side prediction, server reconciliation, and peer-to-peer authority, plus future content ideas and asset references to improve latency and gameplay.

Requirements

Familiarity with general programming concepts

Description

This course teaches you everything you need to know to create a fully playable online cooperative multiplayer game from start to finish using the Godot Engine (version 4.4 or newer).

Core features and mechanics you'll learn include:

Server-authoritative multiplayer architecture
Remote Procedure Calls (RPCs) for state synchronization
Godot’s high-level multiplayer networking system
Twin-stick shooter controls
Modular scene composition
UI layout with Control nodes and theming
Gameplay programming with GDScript

This is just a highlight - check out the full course outline for a complete list of topics covered!

I'm Firebelley. I have over 7 years of experience using the Godot Engine and have published multiple commercial games to Steam. You'll be learning from someone who has used Godot to ship real games. I'm also the instructor behind several other highly-rated Udemy courses.

Whether you're just getting started with Godot or looking to get into online multiplayer game development, this course will walk you through the entire process. By the end, you’ll have a solid understanding of the key concepts and systems needed to build and publish a complete online 2D co-op game.

This course is perfect for you if:

You’re new to Godot and want a hands-on project
You’re interested in building multiplayer games
You have basic programming experience and want to apply it to game dev

Note: This course focuses on building an online multiplayer game in Godot 4.4+. It does not cover programming fundamentals. Familiarity with coding concepts is strongly recommended before enrolling - any programming experience will do. GDScript is easy to learn!

Several lessons are available for free preview - watch them to see if the course pace and teaching style are a good fit for you!

Who this course is for:

Aspiring game developers who want to make multiplayer games
Seasoned Godot developers with an interest in multiplayer
Beginner to intermediate Godot users looking for a complete, hands-on project
Programmers new to game development
Hobbyists and developers looking to learn Godot in a comprehensive way

Create a Complete Online Co-Op Multiplayer Game in Godot 4

What you'll learn

Explore related topics

Course content

Setting Up the Foundation27 lectures • 5hr 20min

Improving the Look of the Game9 lectures • 1hr 56min

Adding More Mechanics9 lectures • 2hr 1min

Adding Even More Polish5 lectures • 1hr 10min

User Interface15 lectures • 3hr 14min

Finalizing Game Mechanics10 lectures • 2hr 51min

Final Polish13 lectures • 1hr 56min

Requirements

Description

Who this course is for: