In Carmine is a fun sci-fi adventure for Mothership RPG, but I used White Star: White Box Science Fiction Roleplaying (134 pages, same place). To create my solo engine, I changed five lines in Star Dogs Referee’s Handbook (62 pages, same place). I used five first level characters.

So, the mission was to travel to the Initial Point Of Replication (the “IPOR”) to collect a sample of lab-meat tissue. The PCs were dropped off at the Barrenlands and travelled for three nights (because it is sunny and hot during the day). They encountered polyps, Carminian Foxes, trees with attitude, a crashed transport, and a mouth pit. No PC casualties, yet. At the lab, level one, they encountered a polyp hidden in a hazard suit. The creature blew up and killed my alien PC Alespis. On level two, they encountered a meltmind that had polyps growing out of his face. A polyp attacked my mystic, blew up, and killed my PC. On level three, my Star Knight PC (he was forced out of the order, long story) attempted a saving throw to avoid death by infection. He did it (sigh of relief). My three remaining PCs got the tissue sample and headed back to the drop-off location. At this point, they saw the drop-off ship being attacked by an alien spacecraft. The drop-off ship was destroyed. My team just stood there on the surface of the planet, waiting for destiny to turn them into dust. The alien ship landed and the friendly aliens explained what had happened (they had felt threatened). They let the PCs come on to their ship, they took them where they wanted to go, and the PCs were able to complete their mission. Give this adventure a try!