There are several online backgammon rooms, but the most reputable are Party Gammon and BGRoom. Party Gammon gives you a 30% up to $150 bonus for your first deposit if you use TFGAMMON as your bonus code. BGRoom offers a $5 no-deposit bonus, so you don't even need to deposit to try the game. BGRoom also gives you 30% up to $30 bonus on your first deposit.