Vs. System, also written as VS System and abbreviated as VS, is a collectible card game designed by Upper Deck Entertainment (UDE). In the game, players build and play a deck of Vs. System cards in an attempt to win a game against their opponent. It was first published in 2004 and is set in the superhero genre. The game was discontinued by Upper Deck Entertainment in January 2009.

Boleslav William Felix Robert Sienkiewicz is an American artist known for his work in comic books—particularly for Marvel Comics' New Mutants, Moon Knight, and Elektra: Assassin. He is the co-creator of the character David Haller / Legion, the basis for the FX television series Legion.