Define the game idea
Choose the genre
Identify the target audience
Set the platform
Write the core gameplay loop
Create a game design document
Plan the scope
Pick a game engine
Choose the programming language
Build a prototype
Test the prototype
Refine the mechanics
Design the levels
Create the art style
Make the assets
Add sound and music
Implement user interface
Program game systems
Add controls
Add menus and settings
Balance difficulty
Fix bugs
Optimize performance
Playtest with users
Iterate on feedback
Prepare for release
Publish the game
Update and maintain the game