Define the game idea
Choose the genre
Identify the target audience
Set the platform
Decide the scope
Write the core gameplay loop
Create a game design document
Select a game engine
Choose the programming language
Plan the art style
Plan the sound design
Build a prototype
Test the prototype
Refine the mechanics
Create the game assets
Implement the user interface
Add audio and music
Develop levels or content
Add menus and settings
Optimize performance
Fix bugs
Playtest repeatedly
Balance difficulty
Polish visuals and gameplay
Prepare marketing materials
Publish the game
Collect player feedback
Release updates and patches