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.

Fantasy Flight Games (FFG) is a game developer based in Roseville, Minnesota, United States, that creates and publishes role-playing, board, card, and dice games. As of 2014, it is a division of Asmodee North America.