Crystal Scarabs Review: 3 Oaks Gaming's Dual-Mode Egyptian Slot, 1620 Spins

Three sources, no official confirmation: Crystal Scarabs' 95.6% RTP is aggregator-sourced, appearing on SlotCatalog and AskGamblers, not published by 3 Oaks Gaming and not shown in the in-game rules. My 1620-spin session returned 79.91% - a 15.7-percentage-point gap that sits within expected variance for a High-volatility game over this sample, not a signal the stated figure is wrong. The game runs on a 5x4 grid with two separate bonus modes - Free Spins and a Hold & Win Bonus Game - that can each trigger independently or both from the same spin. The jackpot sidebar along the left edge of the screen displays all four fixed-multiplier tiers simultaneously from the first spin: GRAND 5,000 / MAJOR 100 / MINOR 50 / MINI 20 at a 1.00 stake.

I ran 1620 spins on the provider-direct 3 Oaks demo to log trigger frequency, bonus distribution, and the relationship between the dual-mode structure and session variance. The totals add up exactly: start $1,000.00 minus $1,620.00 total bets plus $1,294.50 total returns equals final $674.50.

How Crystal Scarabs Works

Crystal Scarabs runs on a 5x4 grid with 15 fixed paylines. Wins pay left to right from reel 1, consecutive positions only. No win-both-ways, no variable paylines. The Wild appears on all five reels and substitutes for every symbol except Scatter and Bonus. At 1.00 total bet, five Wilds across a payline pay 50x - the highest single payline value in the base game.

The premium symbol pair is Pharaoh and Cleopatra, both at 25x for five-of-a-kind, 3x for four, 1x for three. The middle tier - Eye of Ra, Crystal Scarab, and Ankh - each pay 15x for five-of-a-kind. The card royals (A/K and Q/J) pay 5x for five. The Scatter only lands on reels 2, 3, and 4. Three Scatters trigger 8 Free Spins.

The BONUS symbol appears on all five reels but pays nothing during the base game or Free Spins. It only counts during the Bonus Game or when the BOOST FEATURE fires. Bet range: external research places minimum bet at $0.20 per spin, maximum around $44 per spin. Neither figure was confirmed from the provider page directly - the session I ran used a fixed $1.00 stake.

Bonus Features: Boost, Free Spins, and Hold & Win

Boost Feature

The BOOST symbol - a glowing blue circle, visually separate from the gold BONUS scarab symbols - triggers the Boost Feature when it lands alongside any BONUS symbol. The feature sums all visible BONUS symbol cash values and adds that total to the current spin's win. No separate board opens; it is an additive win within the existing spin result. It fires more frequently than the full Bonus Game and functions as a return path between base-game payline hits and full Hold & Win sequences.

Free Spins

Three Scatter symbols on reels 2, 3, and 4 simultaneously trigger 8 Free Spins. Landing three more Scatters during the feature adds another 8 spins; the retrigger rule is stated in the Common Rules with no stated maximum. During Free Spins, the reel set is enriched - more BOOST and BONUS symbols are added, which increases both Boost Feature frequency and Hold & Win trigger probability from within the feature. In my 1620 spins, Free Spins triggered 12 times, averaging 15.4x per round across all 12 entries.

Hold & Win Bonus Game

Six or more BONUS, BONUS GOLD, or BOOST symbols landing simultaneously trigger the Hold & Win. The game shifts to a 5x4 board (20 positions) with 3 starting respins. BONUS symbols on the main three rows each carry a cash value: 0.5x, 1x, 2x, 3x, 5x, 8x, or 10x Total Bet. Every BONUS symbol that lands locks in place and resets the respin counter to 3. The counter falls by 1 each respin where no new symbol lands. When it reaches zero, the round ends and all locked values pay.

The top row of the board operates differently - only PLUS, MULTIPLIER, and GOLD cells appear there. PLUS adds a random value to all BONUS symbols directly below it in the column. MULTIPLIER applies a random multiplier to all BONUS symbols in its column. GOLD converts one BONUS symbol to a BONUS GOLD symbol on the reel directly below it. If all 20 board positions fill with BONUS and BONUS GOLD symbols, all values double.

Jackpots

Jackpots are earned by collecting BONUS GOLD symbols during the Hold & Win board. The four fixed-multiplier tiers at 1.00 total bet: MINI (2 BONUS GOLD = 20x), MINOR (3 = 50x), MAJOR (4 = 100x), GRAND (5 = 5000x). These are fixed multipliers - the payout is always the same multiple of the triggering bet. At $1.00 the GRAND always pays $5,000; at $0.20 minimum, it pays $1,000.

Extra Bonus Game

Each BONUS symbol landing in the base game incrementally increases the trigger probability of an Extra Bonus Game. The Extra Bonus Game can only trigger during the main game, not during Free Spins. It operates as an additional Hold & Win-style board entry without requiring the standard 6+ symbol trigger. The Hold & Win can also trigger during a Free Spins round - on 6 spins in this session, both Free Spins and Hold & Win fired together - 12 of the 25 trigger events.

My 1620-Spin Session

I ran 1620 spins at $1.00 per spin on the 3 Oaks Gaming provider-direct demo, session date July 2026. I tracked every spin result by hand, and the balance math adds up: start $1,000.00 minus $1,620.00 total bets plus $1,294.50 total returns equals the final $674.50 balance.

Session Figures

The balance moved in one consistent direction. The session opened at $1,000, sat at $943 by spin 381, $793 by spin 795, $713 by spin 1205, and closed at $674.50. No recovery phase returned the balance toward the starting point. Early bonus activity between spins 80 and 383 - five triggers in that range - held the drawdown below 6% through spin 381. The second half of the session had fewer high-value bonus entries, and the net loss accumulated steadily until two strong Hold & Win results at spins 1194 (92x) and 1226 (156x) partially offset the decline.

On 6 spins, both Free Spins and Hold & Win fired from the same spin - 12 of the 25 trigger events. This occurs when BONUS symbols accumulate to 6+ during a Free Spins round, triggering the Hold & Win board from within the feature. Those six dual-trigger spins included the two largest Hold & Win returns - the 92x at spin 1194 and the 156x at spin 1226.

Hold & Win results across the 13 rounds ranged from 18.5x (7 respins, spin 365) to 156x (24 respins, spin 1226). Average Hold & Win result: 49.6x across 13 rounds. Free Spins yielded between 0x and 33.5x across 12 rounds. Average: 15.4x. Total bonus winnings: $830.00 of $1,294.50 total returns (64.1%).

Session Progression

Test limitations: This review is built on a single 1620-spin session in the 3 Oaks Gaming demo using virtual credits. The session ran to completion - 1620 spins reached, no early termination. Features not observed in this session: neither the GRAND jackpot (5000x) nor the MAJOR jackpot (100x) landed; the full-board fill that doubles all BONUS values did not occur. A single demo session cannot establish long-run trigger rates or predict future session returns. The 79.91% observed RTP is a session result, not a product specification - the stated figure from aggregators is 95.6%.

Bankroll and Practical Notes

No Buy Bonus means every bonus entry requires a base-game trigger. At the session average of 1 per 64.8 spins, the expected wagering cost to reach any bonus is approximately 65 spins - about $65 at $1.00 per spin, about $13 at the $0.20 minimum. I use 200x the stake as a working session buffer. At $0.20 per spin that is $40. At $1.00 per spin, $200. That covers a reasonable number of triggers without being eliminated in an early cold stretch. The session cost $325.50. The math has opinions.

The Free Spins average in this session was 15.4x per trigger. At $1.00 bet, a 15.4x FS result returns $15.40 against an expected trigger cost of about $64.80. Free Spins alone do not recover the expected wagering cost to reach a trigger at average returns. The Hold & Win rounds - averaging 49.6x per trigger in this session - are where the session RTP is primarily earned.

Pros and Cons

How Crystal Scarabs Compares

3 Oaks Family - Same Studio

Wolf Night (3 Oaks Gaming) runs the same Hold & Win engine - same top-row PLUS/MULTIPLIER/GOLD booster structure, same four-tier fixed jackpot ladder, same respin mechanic. Crystal Scarabs adds Free Spins as a second distinct bonus mode. Both titles were released in the same year; the bonus board mechanics are structurally identical. Book of Cats (3 Oaks Gaming) also carries an Egyptian theme but takes a different path: expanding symbols during Free Spins, no Hold & Win board, no jackpot ladder. Within the 3 Oaks catalog, Crystal Scarabs sits in the Hold & Win branch, not the expanding-symbol branch.

vs. Legacy of Dead (Play'n GO)

Legacy of Dead is the most common Egyptian alternative in online casino lobbies. RTP: 96.58% as published by Play'n GO - higher than Crystal Scarabs' aggregator-sourced 95.6%, and disclosed officially. The bonus structure is entirely different: a single Free Spins mode with one randomly selected expanding symbol, no Hold & Win component, no jackpot ladder. Crystal Scarabs' ceiling comes from a defined jackpot structure (5000x GRAND) that requires a specific board state.

vs. Dragon Pearls Hold & Win (Booongo)

Dragon Pearls Hold & Win (Booongo) uses a structurally similar fixed-jackpot Hold & Win format. RTP at Dragon Pearls is approximately 96.57% from aggregators - higher than Crystal Scarabs' 95.6%. Booongo's version runs a 5x3 grid against Crystal Scarabs' 5x4 (20 vs 15 board positions). The main structural difference: Crystal Scarabs adds Free Spins as a second bonus mode alongside the Hold & Win, while Dragon Pearls Hold & Win is primarily focused on the board mechanic.

Verdict

Crystal Scarabs is a high-ceiling, high-patience title. The 5000x GRAND jackpot and the top-row PLUS/MULTIPLIER/GOLD booster system give it the most developed Bonus Game in 3 Oaks Gaming's Egyptian Hold & Win catalog, and the Boost Feature keeps the base game from going fully cold between Bonus triggers. The trade-off is the 95.6% RTP - aggregator-sourced, not officially disclosed - paired with High volatility, which together push the practical bankroll requirement up.

Over my 1620-spin session the balance moved steadily downward from $1,000 to $674.50 (-$325.50 net). Two Hold & Win entries at spins 1194 (92x) and 1226 (156x) provided the session's major returns; without those the deficit would have been substantially deeper. The GRAND jackpot never landed; the full-board doubling state never occurred across 13 Hold & Win rounds.

Who it's for: players who want a genuine dual-mode bonus structure - Free Spins plus a Hold & Win board with a 5000x jackpot target - and can absorb long base-game stretches on a bankroll sized for High volatility. Players who prioritise RTP have better-value options in the same studio's catalogue.

Frequently Asked Questions

How This Review Was Built

Alex Reeves

Casino industry analyst and former software QA engineer with 12 years of experience stress-testing slot mechanics. Specialises in volatility analysis, Hold & Win jackpot structures, and session-based RTP verification across 3 Oaks Gaming, Pragmatic Play, and Play'n GO titles.

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About this review: Last updated July 16, 2026. Data source: in-game Rules (9 pages), Common Rules, 1620-spin demo session at the 3 Oaks Gaming provider-direct URL, July 2026. RTP 95.6% from SlotCatalog / AskGamblers. Submit a correction.