From Introduction: Welcome back, Cadet! Retro Rockets, a series detailing pulp-SF rocket ships for your d20 campaigns, continues with two more rockets and a nifty rocket belt! Just as in the first volume, which shouldn’t shock you at all, the rocket ships in these pages are written up as vehicles, using the standard Modern D20 vehicle format. Game masters wishing to use the Future SRD can adapt the vessel with that system’s starship rules – although, as presented in the pulps, these ships are universally treated more like traditional aircraft than starships .