Right, but many games are complete enough to not need more. The question was if a game can be complete without a robust bestiary.I'm not sure I know of a single game I've played in the last 40 years that'd pass that test, mostly because traps are so very simple most of the time. I mean, I'm not sure I'd describe OD&D monsters that way, and they were dirt simple compared to opponents in virtually anything else I've run.