---
name: game-development
description: "Game development orchestrator. Routes to platform-specific skills based on project needs."
allowed-tools: Read, Write, Edit, Glob, Grep, Bash
risk: unknown
source: community
---
# Game Development
> **Orchestrator skill** that provides core principles and routes to specialized sub-skills.
---
## When to Use This Skill
You are working on a game development project. This skill teaches the PRINCIPLES of game development and directs you to the right sub-skill based on context.
---
## Sub-Skill Routing
### Platform Selection
| If the game targets... | Use Sub-Skill |
|------------------------|---------------|
| Web browsers (HTML5, WebGL) | `game-development/web-games` |
| Mobile (iOS, Android) | `game-development/mobile-games` |
| PC (Steam, Desktop) | `game-development/pc-games` |
| VR/AR headsets | `game-development/vr-ar` |
### Dimension Selection
| If the game is... | Use Sub-Skill |
|-------------------|---------------|
| 2D (sprites, tilemaps) | `game-development/2d-games` |
| 3D (meshes, shaders) | `game-development/3d-games` |
### Specialty Areas
| If you need... | Use Sub-Skill |
|----------------|---------------|
| GDD, balancing, player psychology | `game-development/game-design` |
| Multiplayer, networking | `game-development/multiplayer` |
| Visual style, asset pipeline, animation | `game-development/game-art` |
| Sound design, music, adaptive audio | `game-development/game-audio` |
---
## Core Principles (All Platforms)
### 1. The Game Loop
Every game, regardless of platform, follows this pattern:
```
INPUT → Read player actions
UPDATE → Process game logic (fixed timestep)
RENDER → Draw the frame (interpolated)
```
**Fixed Timestep Rule:**
- Physics/logic: Fixed rate (e.g., 50Hz)
- Rendering: As fast as possible
- Interpolate between states for smooth visuals
---
### 2. Pattern Selection Matrix
| Pattern | Use When | Example |
|---------|----------|---------|
| **State Machine** | 3-5 discrete states | Player: Idle→Walk→Jump |
| **Object Pooling** | Frequent spawn/destroy | Bullets, particles |
| **Observer/Events** | Cross-system communication | Health→UI updates |
| **ECS** | Thousands of similar entities | RTS units, particles |
| **Command** | Undo, replay, networking | Input recording |
| **Behavior Tree** | Complex AI decisions | Enemy AI |
**Decision Rule:** Start with State Machine. Add ECS only when performance demands.
---
### 3. Input Abstraction
Abstract input into ACTIONS, not raw keys:
```
"jump" → Space, Gamepad A, Touch tap
"move" → WASD, Left stick, Virtual joystick
```
**Why:** Enables multi-platform, rebindable controls.
---
### 4. Performance Budget (60 FPS = 16.67ms)
| System | Budget |
|--------|--------|
| Input | 1ms |
| Physics | 3ms |
| AI | 2ms |
| Game Logic | 4ms |
| Rendering | 5ms |
| Buffer | 1.67ms |
**Optimization Priority:**
1. Algorithm (O(n²) → O(n log n))
2. Batching (reduce draw calls)
3. Pooling (avoid GC spikes)
4. LOD (detail by distance)
5. Culling (skip invisible)
---
### 5. AI Selection by Complexity
| AI Type | Complexity | Use When |
|---------|------------|----------|
| **FSM** | Simple | 3-5 states, predictable behavior |
| **Behavior Tree** | Medium | Modular, designer-friendly |
| **GOAP** | High | Emergent, planning-based |
| **Utility AI** | High | Scoring-based decisions |
---
### 6. Collision Strategy
| Type | Best For |
|------|----------|
| **AABB** | Rectangles, fast checks |
| **Circle** | Round objects, cheap |
| **Spatial Hash** | Many similar-sized objects |
| **Quadtree** | Large worlds, varying sizes |
---
## Anti-Patterns (Universal)
| Don't | Do |
|-------|-----|
| Update everything every frame | Use events, dirty flags |
| Create objects in hot loops | Object pooling |
| Cache nothing | Cache references |
| Optimize without profiling | Profile first |
| Mix input with logic | Abstract input layer |
---
## Routing Examples
### Example 1: "I want to make a browser-based 2D platformer"
→ Start with `game-development/web-games` for framework selection
→ Then `game-development/2d-games` for sprite/tilemap patterns
→ Reference `game-development/game-design` for level design
### Example 2: "Mobile puzzle game for iOS and Android"
→ Start with `game-development/mobile-games` for touch input and stores
→ Use `game-development/game-design` for puzzle balancing
### Example 3: "Multiplayer VR shooter"
→ `game-development/vr-ar` for comfort and immersion
→ `game-development/3d-games` for rendering
→ `game-development/multiplayer` for networking
---
> **Remember:** Great games come from iteration, not perfection. Prototype fast, then polish.