Valve’s steam service.
Steam is a game client that allows a person to buy games, trade games, and make friends. Steam essentially is a game download store wrapped up with almost a social network. Steam is owned and run by Valve, a private company. The best part is Steam has massive sales on games quite often and these sales can reduce the price of a game by 75% off or more. With these massive sales it is possible to get games for 5 dollars or less. There are always huge sales at Christmas and randomly in the Summer. Games like Terraria, Max Payne and Civiliziation 5 are avaible for download at low prices.