WATCH: Here is a list of the top six most expensive video games in the world.
1991 Campus Challenge | $14,000-$20,100
This cartridge was used for Nintendo-hosted competitions located at over 60 different college campuses nationwide. Three minigames are included - "Super Mario Bros. 3," "Pin*Bot" and "Dr. Mario ."
Birthday Mania | $15,000-$35,000
Developed by Personal Games, these could only be ordered via magazine ads. Due to low demand at the time, very few copies exist today.
Air Raid | $14,000-$33,433
This special copy of the Atari 2600 title is known for its unique blue cartridge and T-shaped handle. Only 12 copies are known to exist at this time.
Gamma Attack | $20,000 - $50,000
This was the only game developed by Gammation, but it was never actually released. It is arguably the most valuable game in existence for the Atari 2600 system.
Stadium Events | $13,000-$75,000
After its initial 1987 release, the game was quickly recalled and rebranded under the name "World Class Track Meet." The original copies vary in price depending on condition, but a mint box alone is worth around $10,000.
1990 World Championships | $26,667-$100,088
116 of these cartridges were made, with 90 being gray and the other 26 being gold. The gold cartridges are worth much more, with the highest being sold at over $100k.
WATCH | Some of the rarest Pokemon cards can fetch a very high price, as well.