Game Development skills for Codex
Skills for building games: Unity C# and performance, Godot 4 with GDScript or C#, Unreal basics, Phaser, PixiJS and Babylon.js on the web, game loops and ECS, multiplayer netcode, physics, procedural generation, shaders, game AI and save systems, plus Roblox Luau and Bevy.
curl -fsSL codexskills.dev/install.sh | sh -s -- --category gamedev Installs all 20 into ~/.agents/skills/. Or download the zip.
All 20 Game Development skills
Each opens the full SKILL.md, example prompts and every way to install it.
-
Babylon.js 3D Games
Web 3D that loads lean and holds its frame rate -
Bevy Engine
Rust ECS games that compile on your Bevy version -
ECS Architecture
Data-only components, single-purpose systems -
Game AI
Enemies that read well and stay on budget -
Game Loop Architecture
Fixed ticks, smooth frames, no spiral of death -
Game Physics
No tunnelling, no jitter, controllers that feel right -
Game Save Systems
Saves that survive crashes and patches -
Game UI and Menus
Menus that work with a controller in hand -
GLSL and WGSL Shaders
Shaders that compile on phones and look right -
Godot 4 C#
Godot with .NET, minus the generator surprises -
Godot 4 GDScript
Typed scripts, small scenes, signals up -
Multiplayer Netcode
Instant local feel, server-decided outcomes -
Phaser Games
Clean scenes, pooled sprites, crisp pixels -
PixiJS v8 Rendering
Batch-friendly 2D scenes that stay at 60 FPS -
Procedural Generation
Seeded worlds that are always playable -
Pygame Games
Python 2D games that run the same on every PC -
Roblox Luau Scripting
Exploit-proof remotes and saves that never vanish -
Unity C# Scripting
Components that designers can tune, not rewrite -
Unity Performance
Name the bottleneck before touching the code -
Unreal Engine 5 Gameplay
Right class, right side of the network
No Game Development skill matches that.
Where to start
Install the ones that match requests you make every week. Name one with $multiplayer-netcode when you want it for sure; otherwise Codex picks by description.
Start with
- Multiplayer NetcodeInstant local feel, server-decided outcomes
- Babylon.js 3D GamesWeb 3D that loads lean and holds its frame rate
- Bevy EngineRust ECS games that compile on your Bevy version
Install a few by name
curl -fsSL codexskills.dev/install.sh | sh -s -- babylonjs bevy-engine 104-line POSIX script. No sudo, no telemetry. Read install.sh
By stack
Game Development FAQ
How do I install every Game Development skill at once?
Run curl -fsSL https://codexskills.dev/install.sh | sh -s -- --category gamedev to put all 20 in ~/.agents/skills/, or add --project to install them into the current repository's .agents/skills/. You can also download the category zip and unpack it yourself.
Does installing 20 skills slow Codex down?
Hardly. At startup Codex sees only each skill's name and description, a few dozen words apiece, and reads a full SKILL.md only when a task needs it. Install the whole category if the work fits; unused skills cost almost nothing.
Which Game Development skill should I start with?
Start with Multiplayer Netcode, Babylon.js 3D Games, Bevy Engine. They cover the requests that come up most in this category. Mention one with $multiplayer-netcode to try it.