An open handbook for making games
Good questions.
Better game decisions.
Practical principles, their exceptions, and the steps to put them to work. Read a guide, explore a subject, or find an answer for the task in front of you.
Free to read. No account. Take it offline.
Start with a question
What are you working on?
Design a playable level
Test layout, scale, and route choices before committing to detail.
Read the guide →02Turn an idea into a prototype
Find the question worth testing, then build just enough to answer it.
Read the guide →03Keep a project within reach
Choose what matters, account for hidden work, and leave room to learn.
Read the guide →04Learn from a playtest
Observe what players do and turn the evidence into your next experiment.
Read the guide →The wider craft
Find your subject.
146 engine-independent principles, organized into 24 areas of development. Each includes conditions, exceptions, and a source trail.
Browse all topics →Practical engine work
Build it. Test it. Find out why it broke.
Unreal Engine 5.8 tasks and troubleshooting, from animation retargeting to lighting and performance.
A guide, not a rulebook.
Advice is useful when you know its limits. Read the exceptions, follow the sources, and let evidence from your own work change the decision.
How to use the evidence →Bring your AI along.
The same library is available as structured records and portable skills. Download it once and retrieve only what a task needs.
Set up local AI access →