A 1991 side-scrolling platform game developed by id Software and published by Softdisk for DOS, often called the "lost episode" of the Commander Keen series. Keen, an eight-year-old genius, goes on a dream adventure through a vegetable kingdom to defeat the potato king Boobus Tuber and free the children enslaved by his Dream Machine. Instead of a pogo stick and raygun, Keen uses flower power pellets that turn enemies into flowers.