What is a Steam card? The Steam card can be a gift card that can be redeemed for points through Steam. The points in the Steam card can usually be used to purchase games, downloadable content, and in-game content.    The denominations of physical Steam cards are usually $20, $30, $50, and $100. The denominations of the digital cards used are 5 dollars, 10 dollars, 25 dollars, 50...