Double Diamond is IGT’s classic three-reel stepper from 1989: one payline, up to three coins, and a reel set of bars, red sevens and cherries. The Double Diamond symbol is a wild that doubles any win it is part of and quadruples it when two land, and three pay the 1,000x top award online. The online return is 95.44%. The free demo below is a similar diamond slot, with no download.
IGT’s Double Diamond slot machine runs on three reels with one payline across the centre, and the online game takes up to three coins a spin. Listings describe the window as one row or a 3×3 grid, probably because symbols show above and below the line. Bet limits depend on the casino: two review sites give 10 cents to $250, and one US operator runs 25 cents to $100. The online return is 95.44% at every source that lists it. Volatility ratings run from low-medium to high, with high the most common. Hit frequency has not been published for the online game; the land-based figures that exist, a 92.6% payback and a 14.3% hit rate, come from a Double Diamond Deluxe PAR sheet. The top award is 1,000x the stake for three Double Diamonds, or $100,000 at a $100 bet; a few listings show 2,500 credits instead, probably a coin-based figure.
Double Diamond Pokies Characteristics
Everything happens on the centre line. Three matching symbols pay, any mix of single, double and triple bars pays a smaller amount, and cherries pay in any position on the line, down to a single cherry. The Double Diamond logo is both the wild and the top symbol: it substitutes for any symbol on the payline, doubles a win when one is part of it and quadruples it when two are, and three of them pay the top award.
That is the whole game. There are no free spins, scatters, bonus rounds, bonus buy or progressive jackpot, and neither IGT nor most reviews mention a gamble feature; the odd listing that ticks a box for free spins or a bonus buy is wrong. On the land-based Double Diamond Deluxe, about a second after the reels stop one or more may nudge, though a blank is never nudged onto the line.
Online pays are multiples of the stake on the single line, before any wild multiplier.
There are no scatter pays. A win that includes one Double Diamond pays double and one with two pays four times, so two sevens and a Double Diamond return 160x and one seven with two Double Diamonds returns 320x. The 1,000x for three Double Diamonds is the only large number in the game, and it is fixed: it does not grow with play. On the land-based Deluxe machine the equivalent award is 800, 1,600 or 2,500 credits for one, two or three credits bet.
The Double Diamond symbol is the only feature, and IGT’s own description sets out the rule: it stands in for any symbol on the line and doubles the award, two in a win pay four times the standard award, and three take the top award. One US operator’s rules text says two wilds triple the win, but its own worked example, $32,000 for a seven and two Double Diamonds at a $100 bet, is the four-times figure, so four is correct.
The diamonds also show up more often than they pay. On the Deluxe PAR sheet, each Double Diamond symbol stops on the payline once in 72 stops but sits just above or below it five times as often, which the researchers who studied it treat as near-miss clustering. Seeing a diamond next to the line is common; landing two or three on it is rare.
At 95.44% the online game keeps about 4.6 cents of every dollar bet over the long run, and on a single line the way it gets there matters. The only measured hit rate, 14.3% on the Deluxe PAR sheet, means about one spin in seven pays anything, and about four in five of those hits return 2x or 5x the bet. Sessions are a slow slide broken by the occasional bar or seven, and the wild is what turns a modest win into a useful one. The Deluxe top award comes up about once in 46,656 plays, so it is not something to plan around.
At $1 a spin, $50 covers 50 spins and the long-run cost of that turnover is about $2.30. On those hit numbers about seven of the 50 spins pay, mostly small, so finishing ahead usually takes one of the bigger pays: three sevens alone return $80. A venue machine on the 92.6% Deluxe setting keeps about 7.4 cents per dollar, and there the third credit earns a small extra, a top award of 2,500 credits rather than three times 800.
The Double Diamond Deluxe slot machine is a land-based mechanical variant, not the 1989 original: a single-line quarter game at 25, 50 or 75 cents for one to three credits, with 72 virtual stops per reel and nudging reels. Every land-based figure in this review comes from one approved version of it. Double Diamond Reel MultiPLAY, from around 2010, put up to four games on one machine with 3D graphics, and IGT also uses Double Diamond as the base game on several MegaJackpots titles, Wheel of Fortune among them, which add wide-area progressives that plain Double Diamond does not have.
Anyone looking for a 9-line Double Diamond is probably thinking of Triple Diamond, the sequel: online it has three rows and 9 lines, a Triple Diamond wild that multiplies by three or nine, a 95.06% return and a 1,199x cap. There is no 9-line Double Diamond. Five Times Pay is another IGT single-line classic built around a multiplier wild. As for the online Double Diamond itself, release dates conflict, with 2005, 2014 and 2015 all quoted, and the later two are probably re-listing dates.
The theme is the casino itself: single, double and triple bars, red sevens and cherries on plain reels, with the Double Diamond logo as the wild and top symbol. IGT credits the 1989 original with helping bring themed gaming machines to casino floors; today it reads as the definition of a plain reel slot. The land-based machines are mechanical steppers with nudging reels. Online, the game recreates the pay glass and reels, adds autoplay and runs on mobile and desktop. No source describes the sound.
Double Diamond is a US-style reel slot, and we found no evidence of it on Australian club, pub or casino floors: IGT has an Australian subsidiary, but no Double Diamond approval appeared in the ACT instruments checked, and one major Australian casino’s published machine rules list no IGT games at all. Online, the confirmed real-money availability is in regulated US markets. We could not confirm the game at any of the offshore casinos accepting Australians that we checked, so availability varies and a lobby search for the title is the way to check. Free Double Diamond slots are offered on review sites, but we found no official IGT demo. Since July 2025 IGT’s slot business has been owned by Apollo-managed funds, merged with Everi, and still trades as IGT.
Double Diamond suits players who want a classic reel slot in its plainest form: one line, a paytable that takes a minute to memorise and a wild that makes any win it touches worth two or four times as much. It does not suit anyone who wants free spins, bonus rounds or long sessions on a small balance, because most spins pay nothing and there is nothing else to wait for. At 95.44% online it is slightly on the expensive side. The one thing to check is which game has loaded: the names are close, but Triple Diamond has different lines, multipliers and returns.
95.44% online, the same at every source that lists it. Venue machines run one of several approved versions; the one published Double Diamond Deluxe version pays back 92.6%.
It substitutes for any symbol on the payline and doubles the win. Two in a win pay four times, and three pay the 1,000x top award. There are no free spins or bonus rounds.
1,000x the stake online, which is $100,000 at a $100 bet. On the land-based Deluxe machine the top award is 2,500 credits at the three-credit maximum.
Land three matching symbols, any three bars, or one or more cherries on the centre line. Every spin is independent, so no betting pattern changes the odds.
No Australian venue presence was found, and the game was not confirmed at the offshore casinos we checked. Confirmed real-money play is in regulated US markets.
No. The 9-line game is Triple Diamond, the sequel, with a wild that multiplies by three or nine and a 95.06% return.
