in the game, the player with the highest endurance total wins the game. Then all players may simultaneously recover one stunned character, KO all remaining stunned characters, and ready all objects (characters, locations, equipment) they control. Once these steps are performed, the initiative passes clockwise to the next player, the Recovery Phase ends, and the next turn commences with the Draw Phase. Variant rules Grand Melee: A regular game of Vs. System for any number of players. Last man standing wins. Team Alliance: A 2-on-2 game of Vs. System. Teammates sit across from each other. Plays just like grand melee, but teammates share an endurance total of 100 and cannot attack each other. Play until only one team is left. Two-Headed Mutant: A 2-on-2 game of Vs. System. Teammates sit next to each other across from their opponents. Each team begins the game with 100 endurance. This game variant can be played with any number of people on either team, as long as the teams are even numbered. 50 endurance is added onto the total endurance score for each person on a team. Therefore, a Three-Headed Mutant would see a game with 150 endurance. Card sets All cards are marked in the lower left with an expansion code or set code, a three-letter code identifying the set in which the card was published. The first letter of the set code indicates the setting (D for DC Comics and M for Marvel Comics), except for the Essential Collection set, which starts with the letter E. Most Vs. System cards are released in expansion sets, of which there were a total of 18. The first 14 expansion sets all had either 165 or 220 cards, but starting with Marvel Legends, which had 273 cards, the size of expansion sets grew larger, peaking at 330 cards of the Marvel Universe set. Marvel Legends also debuted a card face layout redesign. The game was also periodically supplemented by the release of starter deck sets, of which there were a total of 6. The starter deck sets each contained two playable 40 card mini-decks. They pitted two teams against each other, typically a "hero" team versus a "villain" team. The first 3 (X-Men vs. the Brotherhood, Spider-Man vs. Doc Ock, and Batman vs. the Joker) drew all their cards from other expansion sets. However, the last 3 (Batman, Fantastic Four, and X-Men) contained new cards