Saturn Guardian Heroes. I let someone borrow it, they returned it, and it disappeared. This was almost 10 years ago. I've also had games stolen (such as Lunar PS1, Sympony of the night etc.) but I have been able to replace them, yet, Guardian Heroes still eludes me. I paid $20 for it at Mongomery Ward after reading the EGM review. It stinks when you purchase a game that you hunted for and remeber the reason why you looked for it. Its not like me now, where I look for titles at Pawns / Fleas / Thrifts for rarity and such, those if I bump into, then awsome but they're "find" or "hunt" based, whereas back in the day, I was looking for games I wanted to play that I could afford on my meager high school Burger King hourly wage and to see some of those games I bought increase in time after getting hours of enjoyment from them over the years it has been great (examples - BOF2 SNES, FFVII, Dragon Force, Shining Force 3) and its shame that my Guardian Heroes is not there in the group as I remeber hunting every store in town for a copy.
My ode to Guardian Heroes post.