Beyond the Creaky Gate, Worlds of Possibilities Await.
Creaky Gate Games makes interactive fiction games -- half game, half story, all fun. Each story has multiple endings. Which ending you get depends on the decisions you make. And if you don't like the ending? Play again and get a new one.
The games are text-based, but the easy hyperlink-based system makes them easy to play even if you're not familiar with text-based games. (We use Twine to make our games.)