the grandson of Wolfenstein protagonist William "B.J." Blazkowicz and the father of Doomguy from Doom. Commander Keen himself has appeared or has been referenced in many other video games over the years, including Doom II, Duke Nukem, Bio Menace and more recently in Doom. A number of fan-made Commander Keen games have been created since the publication of the original titles, with a fan website, the Public Commander Keen Forum, devoted to their creation, announcement, and discussion. Since the release of utilities to modify the levels and graphics in the original Keen series in 2002, more than fifty mods have been made, most of which feature Commander Keen as the protagonist. These mods include "Commander Genius", an engine, released for multiple platforms, which interprets the episodes as a "retro-evolved" game, with re-polished graphics, a multiplayer compatibility, and a level editor, ports and remakes on different platforms, and The Universe Is Toast! mod, an unofficial sequel trilogy of games. In January 2013, Tom Hall began development of Worlds of Wander, a tool for creating platform games, and the following month began a Kickstarter campaign for the tool and associated game, Secret Spaceship Club, which he described as a spiritual successor to Commander Keen. The project was unsuccessful in reaching its goal, though Hall said that he planned to continue working on it in his spare time. References Sources External links Official 3D Realms (formerly Apogee) sites for Invasion of the Vorticons and Goodbye, Galaxy, including downloads for "Marooned on Mars" and "Secret of the Oracle" All three episodes of Invasion of the Vorticons ("Marooned on Mars", "The Earth Explodes", and "Keen Must Die!"), the DOS version of Commander Keen in Keen Dreams, and "Secret of the Oracle" can be played for free in the browser at the Internet Archive ZeniMax Media franchises Apogee games Child characters in video games Episodic video games Games commercially released with DOSBox Id Software games Side-scrolling platform games Video game franchises introduced in 1990 Windows games