Little Samson (1992)

A Taito platformer developed by Takeru, Little Samson lets you switch among four heroes with different abilities, and it sold poorly when it came out in 1992. That is the whole secret of its rarity: no recall, no contest, just a very good NES game that few people bought. It is the cartridge on this list most worth actually playing, and playing it no longer requires hunting the original, since the game has since been reissued for modern systems.