If you want to learn to create relatively simple online games using Javascript, then the HTML5 Game From Scratch Step By Step Learning JavaScript course is a great place to start.

Then, you'll move into courses that let you build interactive games using JavaScript, so you can code and apply Game Logic from scratch.

Then, you'll move into courses that let you build interactive games using JavaScript, so you can code and apply Game Logic from scratch.

However, those with experience can live-code games using JavaScript. Drag and drop cards to “answer” questions, such as, “How do I move?” ...

Initially designed for Valve-developed games, the Source engine has gone on to power some of the most iconic games of all time.