Double Diamond slot online: IGT's three-reel classic with one line and no bonus

Double Diamond is IGT’s three-reel, single-payline slot, and the online version at regulated US casinos keeps the name and the rule that made it famous: one Double Diamond in a win doubles it, two multiply it by four, and three pay the top award. There is no bonus round and there are no free spins. The published RTP is 95.40% in IGT’s rules file at Borgata Online and 95.44% on Bally Casino’s game page.

Why is Double Diamond still played?

It asks for one decision per spin: the bet. One line, three reels and a result you can read at a glance, the same shape as the mechanical-reel cabinets IGT still sells for casino floors, such as Double Diamond Deluxe and Triple Double Diamond. A player who finds 20-line video slots with stacked features hard to follow has very little to learn here.

The trade-off is that every spin is the whole game. With no free spins, no bonus and no jackpot, nothing builds up from one spin to the next, and the wins that change a session come from the diamonds.

How does the online Double Diamond play?

You set a line bet and spin; there is no line selector, so the line bet is the whole stake. The Double Diamond symbol is the wild: it fills in for other symbols, then doubles the win with one diamond or quadruples it with two, and three diamonds pay the top award. One Cherry anywhere on the line pays, mixed bars pay an Any Bar win, and diamonds with only blanks pay nothing.

The Cherry has its own twist with the wild, set out in how Double Diamond plays online.

Double Diamond or Triple Diamond?

Triple Diamond is its sibling, also online under its own name. It has 9 paylines instead of one, its wild multiplies wins by 3x and 9x instead of 2x and 4x, and it pays small amounts for one or two Triple Diamonds with blanks, where Double Diamond pays nothing. Its published RTP is 95.06%.

Double Diamond vs Triple Diamond compares the two side by side, including what each costs per spin.

What does Double Diamond pay back?

The two published figures, 95.40% and 95.44%, come from different sources and most likely reflect two configurations of the same game. The figure on the rules screen of the game you open is the one that applies. IGT does not publish a volatility rating.

On casino floors, each casino chooses the payback setting from options IGT offers, and the figure is not published per machine. Double Diamond’s RTP and volatility puts the numbers into dollars, and casino floor vs online explains why floor and online figures differ.

Where can you play Double Diamond online?

As of October 2026, Double Diamond is offered by New Jersey operators such as Borgata, whose help pages carry IGT’s rules file for it. Bally Casino, which operates in New Jersey, Pennsylvania and Rhode Island, also lists it, though its site does not say which titles are live in which state. IGT’s online division supplies seven states (Connecticut, Delaware, Michigan, New Jersey, Pennsylvania, Rhode Island and West Virginia), but we found no public list confirming this game state by state.

Real-money play requires you to be 21 or older and physically inside a state where online casinos are legal. Lobbies change, so check the casino’s current game list. Where to play Double Diamond online covers the states in detail, and our responsible gambling guide is worth reading before you deposit.

Can you play Double Diamond free?

The free DoubleDown Casino app names Double Diamond in its App Store listing and offers no real-money gambling. IGT’s license for that app is in dispute, and free play cannot tell you what a real-money version pays back. Playing Double Diamond free explains both caveats.