Play Demo
Strings and percussion spill from the speakers the moment the reels load. The sky burns orange behind a silhouetted palace, sand-coloured reels sit beneath an elephant wild that only appears on the inner columns, and three ornate jars line the top of the grid, each waiting for its matching gem to shatter it open. Mystery of the Lamp Treasure Oasis from IGT leans completely into its Arabian setting and backs it with a layered bonus system that runs three separate features simultaneously when conditions align. Winner of the EKG Slot Awards for Top Performing New Premium Game in 2024, this slot has substance to match its presentation.
Three scatter symbols drive the entire bonus structure. The Double Gem (purple), Ignite Gem (orange), and Jackpot Gem (clear diamond) each correspond to one of three jars sitting above the reels. Every time a gem scatter lands anywhere on the grid during standard play, it flies up to its matching jar. When a jar accumulates enough gems to break, the Mystery of the Lamp Bonus triggers with that feature active. Multiple jars can break on the same triggering spin, activating up to three features simultaneously.
When the Double jar breaks, Double Gems appearing during bonus spins transform into 2x multipliers that are placed directly over coin symbols on the reels. Each 2x multiplier doubles the value of the coin beneath it. Up to 10 multipliers can land per bonus spin, and each individual coin can be doubled a maximum of four times across the entire bonus. The compounding effect of stacking multiple doublings on high-value coins is where this feature generates its largest returns.
When the Ignite jar breaks, Ignite Gems appearing during bonus spins ignite one coin symbol on the reels. The ignited coin receives a value boost at the start of each remaining bonus spin. Available boost values range from 25 to 2,000 times the coin value of the triggering spin. Unlike the Double feature which multiplies existing values, Ignite adds new value to coins progressively across the remaining spins, rewarding longer bonus rounds.
The Jackpot jar activates the highest-ceiling path. When active, each Jackpot Gem that appears during bonus spins fills one gem position under the Grand, Major, Maxi, Minor, or Mini jackpot meter. Filling all three positions under any meter awards that jackpot. The Grand jackpot can be won by collecting three corresponding gems or by locking all 30 bonus reels. The Major jackpot is awarded once per bonus at most. Collected gems are cleared at the end of each bonus.
When the Double, Ignite, or both are active without the Jackpot feature, the bonus plays on 15 separate reels. When the Jackpot feature is active in any combination, the bonus expands to 30 separate reels. The available symbols during the bonus depend on which features are active. With all three running, Coins, Double Gems, Ignite Gems, and Jackpot Gems all appear, creating the densest symbol pool and the highest combined potential. Three bonus spins are awarded at the start. Any new scatter on an unlocked reel resets the spin counter to three, and all reels containing coins lock for the remainder.
Treasure Oasis is one of four variants in IGT’s Mystery of the Lamp family. Each version shares the core jar-breaking trigger system but pairs the Jackpot feature with a different combination of the other two. Enchanted Palace, Secret Bazaar, and Mystical Gardens each offer a distinct feature pairing, giving the series genuine variety beyond visual reskins. The franchise won Top Performing New Premium Game at the 2024 EKG Slot Awards, which speaks to the mechanical appeal of the jar system across all four entries.
Fifty paylines locked to every spin means coverage across the 5×3 grid is comprehensive, and the payline map confirms patterns running through every conceivable combination of positions. Wins pay left to right on consecutive adjacent reels starting from the leftmost, with only the highest win counted per line. Line wins are multiplied by the coin value, and coinciding wins on different paylines are added together. Bonus wins from the Mystery of the Lamp feature operate independently from line wins and are added on top of the total.
The elephant wild substitutes for all standard symbols and appears on reels 2, 3, 4, and 5 during regular play only. It does not replace Double Gem, Ignite Gem, or Jackpot Gem scatters. The jars and gem animations run alongside every spin in the demo, and all features function identically when spinning for free.
All values represent multipliers applied to the coin value. At the default bet level, the Palace Oasis symbol leads the regular hierarchy with a 5-of-a-kind payout roughly 50% higher than the next tier.
| Symbol | 5 of a Kind | 4 of a Kind | 3 of a Kind |
|---|---|---|---|
| Palace Oasis | 240× | 80× | 24× |
| Gold Lamp | 160× | 40× | 16× |
| Crossed Swords | 160× | 40× | 16× |
| Lantern Pavilion | 160× | 40× | 16× |
| Symbol | 5 of a Kind | 4 of a Kind | 3 of a Kind |
|---|---|---|---|
| A | 80× | 16× | 8× |
| K | 80× | 16× | 8× |
| Q | 80× | 16× | 8× |
| J | 80× | 16× | 8× |
| 10 | 80× | 16× | 8× |
| 9 | 80× | 16× | 8× |
Mystery of the Lamp Treasure Oasis pairs one of the most thoughtfully layered bonus systems in IGT’s online catalogue with an RTP that works against it. The three-jar trigger builds genuine anticipation, the simultaneous feature activation on up to 30 reels creates interactions most slots never attempt, and the Arabian presentation holds together from first spin to last. At 94.22%, the statistical underpinning does not match the quality of the engineering above it. A significant title that earns its EKG Slot Award and frustrates with its return in equal measure.
The soundtrack establishes the mood within seconds. A blend of strings, soft percussion, and melodic flourishes that commit fully to the Arabian theme without defaulting to the stereotypical tones that lesser games rely on. The visual design follows the same commitment. Sand-toned reels, an ornate palace backdrop, and gem-encrusted symbols that carry enough detail to distinguish them at a glance. IGT has always produced visually competent slots, but Mystery of the Lamp Treasure Oasis sits toward the higher end of their presentation quality.
Between triggers, the 50-line grid does what it needs to do without generating much excitement. The card royals all pay identically, which flattens the lower end of the paytable into a uniform baseline. The four themed high symbols differentiate slightly, with the Palace Oasis leading, but even five-of-a-kind wins from the top tier feel modest relative to the coin value. The real function of regular play here is to feed gems into jars, and the visual feedback of watching those jars fill spin by spin adds a layer of progression that pure payline returns do not provide.
When the jars finally broke, the bonus round delivered on the complexity the feature descriptions promise. Three spins on 15 reels with the Double feature active meant every coin landing on the grid had the potential to be doubled by subsequent 2x multipliers. The respin reset kept the round alive as long as new symbols kept appearing, and the locking system ensured every coin already collected stayed in play. Adding the Ignite feature on top would have introduced progressive value boosting to those same coins, and the Jackpot layer would have expanded the grid to 30 reels with jackpot gem collection running alongside everything else.
The 94.22% RTP is the biggest drawback. A feature set this thoughtfully built would benefit from more statistical room to breathe, and at 94.22% the house edge makes the longer stretches between triggers feel heavier than the game’s quality warrants. For comparison, several IGT titles in the same catalogue run at 96% or above, which makes this particular number stand out as a concession rather than a standard.
Mystery of the Lamp won its EKG Slot Award for good reason. The jar-breaking trigger system creates anticipation that accumulates across sessions rather than resolving on individual spins. The three-feature bonus architecture allows for interactions between systems that produce different outcomes depending on which combination activates. And the decision to expand from 15 to 30 reels when the Jackpot feature joins gives the highest-value bonuses a genuinely different scale. Whether the 94.22% return allows enough sessions to reach those moments consistently is the question each player will answer differently depending on how much they value design ambition over arithmetic.
