30. Rarest RPG Owned. The convention preview edition of Mike Nystul’s Whispering Vault is the rarest (as in smallest print run) RPG I can think of. It’s possible I’ve had even rarer games in the library at one time or another, but this one I actually played and enjoyed several times, one session by the writer himself.
I once knew a guy who owned a copy of Spawn of Fashan.
I browsed through a copy in the TSR library, but I never had one of my own.