Sisters of the Sun Slot Review
Play’n GO continue to expand their adventure-themed portfolio with Sisters of the Sun, the highly anticipated sequel to their flagship Moon Princess game. Released in September 2021, this Egyptian-inspired title ditches the fantasy trappings of its predecessor in favour of an Ancient Egyptian setting centred around three powerful goddesses—Sekhmet, Hathor, and Bastet—portrayed as daughters of the Sun God Ra. The studio has significantly enhanced the win potential from the original game, pushing maximum payouts to 15,000x your stake, demonstrating their commitment to delivering genuine volatility alongside familiar cluster pays mechanics. This is a slot built for players seeking a tougher, more complex experience than Moon Princess, combining increased complexity with substantially higher reward potential.
Base Game & Features
Sisters of the Sun operates on a 5×5 grid using Cluster Pays mechanics with cascading wins—not Megaways, despite market trends. The game doesn’t use traditional paylines; instead, winning combinations form when three or more matching symbols land adjacently, either horizontally or vertically. When a win occurs, those symbols disappear and new symbols cascade down to fill the spaces, potentially creating additional winning combinations in a single spin. This cascading system adds tremendous depth to the base game, creating opportunities for consecutive wins from a single stake.
The Eye of Ra Multiplier System
What truly sets Sisters of the Sun apart during base gameplay is the Eye of Ra mechanic. On each spin, five random positions on the grid are marked with hidden Eye of Ra symbols. When a winning combination lands on any of these marked positions, your win multiplier increases by +1. This system creates a persistent multiplier that can accumulate across multiple cascades within the same spin, leading to genuinely impressive base game wins. The multiplier persists into Free Spins, meaning any multiplier you’ve built during the Sisterhood feature carries straight through, amplifying your bonus round potential from spin one.
The Three Goddess Powers
On any non-winning spin during base play, the Goddess Powers trigger randomly. The sister displayed on screen indicates which goddess will activate her unique ability. Sekhmet transforms one set of symbols into another, creating new winning combinations from symbols that weren’t previously adjacent. Hathor places 1 or 2 Wild symbols directly into play, offering immediate win potential. Bastet completely removes two full symbol sets from the grid, compacting remaining symbols and potentially creating cascades. These powers aren’t cosmetic—they meaningfully alter board state and create genuine win opportunities on spins that would otherwise be losses.
Grid Clearing & the Sisterhood Feature
Clear the entire 5×5 grid of symbols, and you’ll receive an immediate cash prize of 50x your total bet, which is then multiplied by any active Eye of Ra multiplier you’ve accumulated. This creates genuinely exciting moments during base play, as the potential for a substantial grid clear bonus keeps the action engaging. Additionally, clearing the grid triggers the entry into Free Spins selection. The Sisterhood feature activates when a Scatter symbol lands on the grid during any spin. This immediately triggers all three Goddess Powers in a single free spin, maximising the board state changes. If you clear the grid during this special Sisterhood spin, you’re awarded Free Spins—no cash reward applies in this scenario, but the progression to the bonus round makes the trade-off worthwhile.
Bonus Features & Free Spins
Free Spins in Sisters of the Sun are where the game’s volatility truly reveals itself. When you unlock the bonus round, you’ll choose between three goddess-themed options, each offering a different risk-versus-reward profile. Sekhmet offers 4 Free Spins with the highest volatility and win potential. Hathor provides 5 Free Spins with moderate volatility—the balanced middle ground. Bastet awards 8 Free Spins with lower volatility, favouring consistency over explosive potential. This player choice is genuinely impactful; selecting Sekhmet with fewer spins means you’re betting on big multiplier accumulation and powerful Goddess Power activations, whilst Bastet provides more opportunities to build wins through sheer spin count.
During Free Spins, the Goddess Powers trigger on every single non-winning spin, not just randomly. This creates relentless board manipulation throughout the bonus round, with cascading wins and multiplier growth happening almost constantly. The Eye of Ra multiplier persists from the Sisterhood feature onwards, meaning if you entered Free Spins with a 3x or 4x multiplier, you’re starting your bonus round with that multiplier already active—and it can only increase further. This creates the genuinely explosive win potential that makes Sisters of the Sun compelling.
Scatter symbols can retrigger at any point during Free Spins, and each additional Scatter awards extra spins—your bonus round can extend up to a maximum of 150 total Free Spins through repeated Scatter retriggers. This creates scenarios where players can experience marathon bonus sessions, particularly on Bastet, where accumulated spins and growing multipliers can generate winning sequences that feel genuinely impressive for a slot of this volatility.
Our Honest Verdict
Overall Rating: 7.5/10
Sisters of the Sun achieves what many sequels struggle with—it feels familiar whilst offering genuine mechanical improvements over its predecessor. The 15,000x maximum win potential is legitimately higher than Moon Princess (5,000x), and that increase reflects real design changes, not marketing hyperbole. The Eye of Ra multiplier system adds meaningful complexity to base gameplay, and the Goddess Powers create board state changes that feel impactful rather than cosmetic. The choice between three Free Spins volatility profiles demonstrates thoughtful game design catering to different player appetites.
However, Sisters of the Sun comes with notable trade-offs. The Ancient Egyptian theme, whilst well-executed visually, lacks the novelty and charm that players loved in Moon Princess’s fantasy setting. The high 8/10 volatility means base game dry spells are real and punishing—this isn’t a game for casual, session-length play. Free Spins triggering only through Scatter symbols landing during Sisterhood (rather than triggering directly from anywhere on the board) feels more restrictive than Moon Princess mechanics, which some players perceive as a step backwards despite the higher win potential compensation.
The game excels for high-volatility chasers seeking genuine mechanical depth and the win potential to justify the variance. The combination of cluster pays with Eye of Ra multipliers and randomised Goddess Powers creates enough mechanical variety to prevent monotony. Yet players preferring consistent base game action or simpler mechanics will find Sisters of the Sun exhausting rather than enjoyable. Community feedback remains split—many recognise the superior gameplay versus Moon Princess, whilst others maintain preference for the original’s more straightforward approach. Sisters of the Sun stands as the bolder, more ambitious sequel; whether that boldness appeals depends entirely on your volatility tolerance.
Sisters of the Sun FAQs
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What is the RTP of Sisters of the Sun slot?
The RTP of Sisters of the Sun by Play’n GO is 96.2%, though it varies by casino operator between 84.2% and 96.2% depending on settings. -
What is the maximum win in Sisters of the Sun?
Sisters of the Sun has a maximum win potential of 15,000x your stake, which is significantly higher than the original Moon Princess game at 5,000x. -
How volatile is Sisters of the Sun slot?
Sisters of the Sun is a highly volatile slot with a volatility rating of 8 out of 10 on Play’n GO’s volatility scale, making it suitable for players seeking bigger wins and willing to weather extended dry spells. -
Does Sisters of the Sun have free spins?
Yes, Sisters of the Sun features free spins that are triggered by clearing the entire 5×5 grid. Players can choose between three goddess-themed free spin options: Bastet (8 spins), Hathor (5 spins), or Sekhmet (4 spins), each with different volatility levels. -
What are the main features of Sisters of the Sun?
Sisters of the Sun includes cascading wins on a 5×5 Cluster Pays grid, Eye of Ra multiplier mechanic (5 random positions increase win multiplier), three goddess powers (Sekhmet converts symbols, Bastet removes symbols, Hathor adds wilds), and player-selected free spin options with up to 150 spins possible via retriggers. -
What is the grid size and win mechanic of Sisters of the Sun?
Sisters of the Sun uses a 5×5 grid with Cluster Pays mechanics, not Megaways. Winning combinations form when three or more matching symbols land adjacently, horizontally or vertically, triggering cascading wins. -
Is Sisters of the Sun a sequel to another game?
Yes, Sisters of the Sun is the direct sequel to Play’n GO’s Moon Princess. It maintains the cluster pays and cascading win mechanics whilst offering a new Egyptian theme and significantly enhanced max win potential (15,000x vs 5,000x). -
What theme does Sisters of the Sun use?
Sisters of the Sun features an Ancient Egyptian theme centred around three goddesses—Sekhmet, Hathor, and Bastet—who are portrayed as daughters of the Sun God Ra. Each goddess has unique powers that influence gameplay mechanics.
