They have launched popular game solitaire, claiming it is a game of skill rather than a game of chance. In addition to solitaire, players can play Free Cell, Minesweeper, jigsaw puzzles and crosswords.
Players can play for free, or can enter their credit card details and play for money.
Research from the River City Group has concluded that although online gambling is illegal in America, over 14,000 websites dedicated to the sport exist, mostly outside the country.