Tony Vargas
Legend
Apparently, TSR didn't retain rights to it, so WotC hasn't been the one to publish it.Pretty much all the good D&D ideas (and plenty of bad ones) have already been done. But some, like Metamorphosis Alpha, haven't been seen for 40 years.
Metamorphosis Alpha was essentially the same game as Gamma World, just set inside a malfunctioning colony ship (per Brian Aldiss's 1958 science-fiction classic, Starship). Gamma World has been through by my count (which pointedly ignores the S&SS d20 modern version and does count Omega World from Dungeon Magazine) seven editions, including FASERIP and Alternity versions.
Metamorphosis Alpha under more or less that name, was re-done in '94 using the Amazing Engine system. And again in 2002 and 2006. The original has also been errata'd and reprinted.