Ashtagon wrote: ↑Fri Sep 27, 2013 6:21 pmThis leads me to note that there were three distinct Sci-Fi genres that early TSR covered. I believe "Post-Whoops" and "Space Hulk" were in a shared universe, but that "Space Opera" was a separate universe.
Gamma World and Omega World (Dungeon magazine) are obviously meant to be in a shared (same?) universe — they both feature aliens (actually mutated animals) called hoops and badders.
The Wasteland (d20 Future) makes no mention of specific aliens or mutants, but it is entirely believable that it could be in a shared universe with Gamma World. Atomic Sunrise (from d20 Apocalypse) is really just a more developed version of The Wasteland, except it includes campaign notes that tie it closer to the USA, and removes even the theoretical Gamma World association.
Star Frontiers (1982) featured dralasites (among others), and was not in the same shared universe as Gamma World. The races were copied and transplanted wholesale into d20 Future Chapter 13.
Star*Drive featured klicks (the designated enemy race, vaguely arachnoid). The d20 Future version doesn't formally specify other races, but implies the full Chapter 13 list is available; the artwork however includes one of the t'sa. I don't have the Alternity version of Star*Drive. What aliens are present in that game?
d20 Future's Star Law doesn't explicitly feature any aliens noted in the text. However, the art includes what looks very much like a weren.
Amazing Engine's Metamorphosis Alpha to Omega features life in a wilderness setting. The tomato surprise is that it turns out to be a starship. Metamorphosis Alpha (1976) is the same thing. AD&D (1e) Module S4 is essentially the same concept, but on a crashed malfunctioning ship that had the same mission. I suspect this is the same "shared universe" as Gamma World, although not the same "campaign setting". The "aliens" are the same hoops, badders, and their friends found in Gamma World.
From what I understand, Gamma World and Metamorphosis Alpha were always assumed to take place in the same universe, so it makes sense that the D20 Modern/Future takes on these settings are similarly connected.
I agree with Ashtagon that there is no reason why any of the Space Opera settings would be connected to Gamma World, though if a GM wanted to he probably could connect them in different ways.
I don't know if I understand why Atomic Sunrise (from D20 Apocalypse) cannot also be set in Gamma World since Gamma World is also based on North America?