The first Star Frontiers adventure, SF0: Crash on Volturnus, is included in the box set. Spoiler: the players crash on Volturnus and have to seek safety. The scenario ends with them coming through a trial by combat in order to join a native tribal group. SF1: Volturnus, Planet of Mystery (1982) is the first stand-alone Star Frontiers module and it picks up where SF0 left off. Jeff Easley’s cover sets the stage, depicting humans encountering the alien tribe, the Ul-Mor. They are octopus aliens riding dinosaurs. That’s a pretty strong start, gotta say.

SF2 reminds me a bit of Isle of Dread, actually. There is less a plot or central dungeon to explore, and more a bunch of regions and factions. This makes sense, since the primary motivation is still survival or escape. But increasingly, exploration becomes central, and also revenge, as the pirates who caused your crash are in the area as well. Lots of weird aliens, lots of fighting, lots of non-combat encounters too. There is a lot to do on Volturnus!