Choose a game idea
Define the genre
Decide the platform
Set the core gameplay loop
Write the game design document
Choose a game engine
Learn the required tools
Create a prototype
Build the main mechanics
Design the levels or world
Add art and animations
Add sound and music
Implement user interface
Test the game
Fix bugs and improve performance
Balance difficulty
Add menus and settings
Publish the game
Collect player feedback
Update and maintain the game