What are some of the Rarest games you own?

[Cypher1980]

I've got

Majoras Mask N64 boxed MINT Condition (sadly not sealed)
Perfect Dark N64 boxed

Metal Gear Solid : Twin Snakes (Used)
Super Breakout Atari 2600 boxed MINT Condition

Frontier First Encounter for the Amiga (Boxed with Starmap)