explaingit

greencrowdev/simple-soccer-online

★ 5GDScriptAudience · developerComplexity · 4/5ActiveSetup · hard

TLDR

Godot demo project showing client-side prediction with server reconciliation over UDP, using a soccer scene as a minimal multiplayer netcode example.

Mindmap

mindmap
  root((simple-soccer-online))
    Inputs
      Host instance
      Client instance
      Spacebar input
    Outputs
      Synced player movement
      Reconciled state
    Use Cases
      Learn netcode
      Prototype multiplayer
      Study Godot UDP
    Tech Stack
      Godot
      GDScript
      UDP

Things people build with this

USE CASE 1

Study client-side prediction and server reconciliation in a working Godot project

USE CASE 2

Build a custom Godot 4.7 engine with the linked physics-stepping patch

USE CASE 3

Use the demo as a starting point for a real-time multiplayer prototype

USE CASE 4

Run a two-instance host and client session to inspect reconciliation behavior

Tech stack

GodotGDScriptUDP

Getting it running

Difficulty · hard Time to first run · 1day+

Requires a custom Godot 4.7 build with a specific physics-stepping pull request applied; a stock engine release will not run the project.

In plain English

Simple Soccer Online is a small demo project that shows how to handle a network multiplayer game in Godot, an open-source game engine. The README is short and presents the repo as a minimal example rather than a finished game. Two game instances, one acting as a host and one as a client, talk to each other over UDP, the same kind of fast, lightweight network protocol that many real-time games use. The specific technique on display has a name in the README: client-side prediction with server reconciliation. In plain terms, the local player does not wait for the network to respond before moving. The client guesses what should happen, draws it right away, and then quietly corrects the picture if the host disagrees once its message arrives. This is the standard trick that makes online action games feel responsive even when the network is slow. The README itself does not go deeper than naming the approach. To actually run the project you cannot use a stock Godot install. The README points to Godot Engine 4.7 with a specific physics stepping pull request applied, linked to a particular branch of the engine on GitHub. That is a fairly demanding setup step for a beginner, because it means building or downloading a custom engine build rather than grabbing the standard release. The controls section lists only the spacebar, which plays or pauses the host simulation. There is no mention of menus, scoring, AI, gameplay rules, or assets beyond what is implied by the soccer theme. The README ends with a short troubleshooting note about jitter and stutter. If the picture is not smooth, the author suggests running in exclusive fullscreen and turning off as much of the on-screen debug UI as possible. Overall, this is a study repo aimed at developers who want a working example of a netcode pattern, not a playable game for end users. The README does not state a license.

Copy-paste prompts

Prompt 1
Walk me through how simple-soccer-online implements client-side prediction with server reconciliation in GDScript
Prompt 2
Explain what the linked Godot 4.7 physics-stepping pull request changes and why it is required
Prompt 3
Show me how the host and client communicate over UDP in simple-soccer-online
Prompt 4
How do I run the host and client locally and what does the spacebar control
Prompt 5
What netcode pattern from this repo would I lift into a real multiplayer Godot game
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Generated 2026-05-22 · Model: sonnet-4-6 · Verify against the repo before relying on details.