- Idiot Plot: The plot of "Neutron Star" depends on pretty much every named character not expecting tidal forces around neutron stars, despite such forces being clearly understood in the 1960s, when the story was written.
- It's the Same, Now It Sucks!: There are two things preventing Fate of Worlds from being a satisfactory conclusion to the Ringworld series: Louis is mostly only a passive observer of events, just like he was in The Ringworld Throne, and the ending is essentially the same as that of Ringworld's Children in that it involves moving multiple-planet-sized objects through hyperspace to get away from attackers.
- Magnificent Bastard: Ol't'ro.
YMMV / Known Space