Commander Keen 20,000
Commander Keen 20,000 is a fangame created by Kohntarkosz with Multimedia Fusion and released in 2007. Its gameplay is similar to that of Goodbye, Galaxy!, though there is no world map.
Commander Keen intends to increase his IQ by two points so that he will always be one step ahead of his arch-nemesis, Mortimer McMire. The protagonist learns about an ancient artifact called the Talisman of Steinad-Kaj that is said to increase the intelligence of its bearer. With the Bean-with-Bacon Megarocket, Keen ventures to the planet Reisiovruoc VII, where the object of desire was once created by the now-extinct Yssenneh civilization.