Good point. The dev commentary for Half-Life 2 and Portal is really awesome, and very useful for level designers. For Half-Life 2 they talk a bunch about setti

Good point. The dev commentary for Half-Life 2 and Portal is really awesome, and very useful for level designers. For Half-Life 2 they talk a bunch about setting up dramatic scenes and in Portal they cover a lot of the ways they had to stop people from cheating. The Portal one is great for really learning how to do a great interactive tutorial. I remember a specific part where they talk about why they had to place a wall in a certain spot so that people would learn to use the portal gun in a specific way.