Commander Keen was one of the first ID Software's games. It was a side-scrolling platformer set in a kid, happy theme. The game was released as a shareware, and it became very popular (so popular that ID released six expisodes). The game can be edited using original TED5 editor (used by the makers to create Keen), and a few other fan-created tools and editors.
One of my very first computer games. I have very fond childhood memories of Commander Keen. I am still hopeful for the completion of the series - if only id Software could find it in their hearts to give Tom Hall the IP rights to the game. The universe will be a much toastier place to be on the day Tom can start making us more Keen.
THE DOPEFISH LIVES!