First episode of the Commander Keen series. On his first trip on his [[ Commander Keen]'s Bean-with-Bacon Mega Rocket|Bean-with-Bacon Mega Rocket]], Commander Keen crash lands on Mars and has a look around, but when he comes back vorticons from Vorticon VI have stolen his shipparts!

Can be downloaded here: Keen1

Levelpack mods

BadBloog has released an excellent levelpack for this episode.