I remember when virtually every single game allowed you to play a 'Demo' for free, so you could find out exactly what the gameplay is like in any game before playing it. They often came in my cereal boxes as a kid, or free to pick up at the checkout. I still have a cool CD from the 2000s which has like five big studio name Demos in one.

Now that's Pepperidge Farm Remembers. Or did I out myself as too old?