Modern game development relies heavily on Lua’s flexibility.
Studios consistently use a set of Lua architectural patterns to build clean, scalable, and maintainable game logic.

This chapter presents the patterns used in:

• 2D/3D indie engines
• AAA game scripting systems
• LiveOps / network games
• Modular UI systems
• Defold / Love2D / Roblox (Luau) / Cocos2d-x Lua
• Custom C++ engines with embedded Lua

We will cover:

1. Entity & component architecture (ECS-friendly)
2. Messaging & event buses
3. Timer systems & schedulers
4. Finite state machines (FSM)
5. Behavior trees (BT) in pure Lua
6. Tweening & animation patterns
7. Modular game script structure

This is the first “serious engineering” chapter in the book.