Players assembled decks composed of 12 cards each. Cards represented characters, places and props from shows broadcast on Cartoon Network, and each card had a color, value and occasionally a special effect that could modify the of other . A game of gToons, which typically lasted about three minutes, involved two players strategically using seven gToons at a time to gain the most points by the game's end. Two colors (determined by the "bottom" card of each player's deck) were goal colors: if the two colors were both "neutral" colors (black or silver), the higher total point value won. If there was exactly one non-neutral color (blue, red, yellow, green, purple, etc.) between the goal colors, a player with more cards of the non-neutral color would receive a 15-point bonus to their total before determining victory. If neither color were neutral, a player could win by having more of each color in play than the opponent; otherwise, the higher total value won. Five separate expansion packs containing different gToons were released between 2003 and 2006.