7. Mystic Warlords Of Ka'a
Sheldon and Raj compete in this fantasy card game tournament against Wil Wheaton in the episode "The Creepy Candy Coating Corollary" (Season 3, Episode 5).
How To Play:
Similar to the rules of "Magic: The Gathering," this card game pits player against player in an attempt to reduce the opponent's health and, ultimately, win duels and battles.
Each card has a rune (color) and rank (number), where higher ranks and runes overrule lower ones.
When one of the players has their health reduced to zero, they lose.