The simulation tag has an empty tag wiki and 9 questions. Of these, 4 are closed, one isn't really an RPG question, one doesn't actually appear to be about simulation at all, these two are game-recommendation questions where simulation was a requirement, and one is a question genuinely about simulation in RPGs.
Should something be done about the simulation tag? At the very least, I believe it should have a tag wiki explaining how it is meant to be used, since it is clearly unclear as it stands. My assumption of the purpose of the tag is that it is meant to be used for questions like the last one. The game-recommendation questions also seem like a possible legitimate use, but requirements for recommendation questions are usually specified in the question rather than in the tags.