Rabbit Hole Riches: Agent of Hearts is the next in the series of Alice in Wonderland inspired games from Play ‘n GO. It has a lot to live up to following popular games such as Rabbit Hole Riches and Court of Hearts (both available to play now on Casino 442). Agent of Hearts is a cascading slot reel game with a high volatility, cluster grid set up with a customisable RTP that can range from 91.28% to 96.25%. Follow this slot game review to know if Agent of Hearts is game for you!

Key Features

Reels 7
Rows 7
Paylines 5
Highest Payout 5,262x bet stake
Min. coins per spin 0.20
Max. coins per spin 100
RTP 91.28% – 96.25%
Developer Play ‘n GO
Wilds (Yes/No) Yes
Jackpot (Yes/No) No
Free Spins (Yes/No) Yes
Bonus Round (Yes/No) Yes
Respins (Yes/No) No
Scatter symbols (Yes/No) No
Release date 20th August 2021


Theme and Design

Agent of Hearts’ backstory is that the Queen of Hearts herself has kept her heart under lock and key, keeping the wealth of the kingdom under her protection. The players’ job is to collect the keys to open her heart again and being awarded well in the meantime. You are joined by four agents in your quest to unlock the Queen of Hearts’ heart, who I’m sure you will know well: Cheshire Cat, Mad Hatter, Caterpillar and Dormouse. The theming in Agent of Hearts is quite weird and wonderful, suitably on brand for any Alice in Wonderland themed game. 

The grid is situated in a fairy-tale world that depicts kettles floating on their own accord, Queen of Hearts grand castle and purple trees that look dream-like. It’s quite a surreal backdrop – which is fitting. The mechanics in this game add to the overall theming, even down to the audio tracks when you collect a wild – the sparkling tunes create a whimsical appeal to the game and are pretty impressive. 

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Unlocking the Queen’s Heart

Once a winning symbol has been achieved on the grid, the cascading reel mechanic removes these, allowing new symbols to appear on the reel. 


x10 on Grid

x12 on Grid

x15 on Grid

Mad Hatter 40.00 160.00 1600.00
Cheshire Cat 20.00 80.00 200.00
Caterpillar 12.00 40.00 80.00
Dormouse 8.00 32.00 64.00
Emerald 4.80 16.00 32.00
Amethyst 4.00 12.00 24.00
Sapphire 3.20 8.00 16.00
Garnet 2.00 4.00 8.00
For further information, check the gameplay, which shows the payout for symbols from x5 – x9 on the grid.


The four agents are situated on the left-hand side of the grid, collecting all winning symbols. Once 6 symbols are won, then the meter for the agents is full, and this produces a modifier that manifests in different ways:

  • Cupcake Splat – this is the Dormouse’s modifier. He runs from across the grid, leaving cupcakes in his trail. The cupcakes can either become random matching symbols or explode to remove the symbols underneath that don’t match to make room for more.
  • Smokin’ Phat – this is the Caterpillar modifier. Once you achieve 6 symbols, the Caterpillar blows smoke trails from his hookah across the grid, transforming the symbols on the reels.
  • Grinning Cat – this is the Cheshire Cat modifier. Graphically, this is the most impressive of the 4 agents. A famous massive Cheshire Cat grin splashes over the reels transforming the symbols on the reel.
  • Mad Hat – this is the Mad Hatter modifier. This is the most rewarding symbol. They remove unmatching symbols from the grid and transform the remaining symbols into matching symbols. 

As these modifiers take over the grid, simultaneously, keys will show on the reels to unlock the Queen’s Heart. Once you have received three keys, you will be rewarded with a free spin that releases the four agents and eventually the Queen of Heart’s Mega Wild. This awards up to 7 wilds placed on the grid before the Mega Wild heart takes its position. 



This is another excellent addition to Play ‘n GOs Alice in Wonderland theme slot games. Agent of Hearts provides players with customisable RTP with a high volatility. It is a fun and entertaining slot which we guarantee you will enjoy. Some may find the lack of variation in the modifiers as disappointing, as they do near enough conduct the same outcome. However, the developers have managed to make each modifier different in its execution, which helps disrupt the repetitiveness that can come with similar modifiers. Play Agents of Hearts now at Casino 442. 


Theme Alice in Wonderland
RTP 91.28% – 96.25%
Volatility  High



Q. What is the RTP for Agent of Hearts?

A. The standard RTP for Agent of Hearts is 96.25%. However, Play ‘n GO also offers lower settings of 94.28% and/or 91.28% – always check the file to find out which version you will be playing to ensure it is to your preference.

Q. What is the maximum win in Agent of Hearts?

A. The maximum bet per spin is 100 coins and the maximum win is 5,262 x the bet or 5,262,600.

Q. How do I deposit money to play Agent of Hearts on Casino442 for real money?

A. There are a variety of options for depositing real money safely and securely. Casino442 will take credit and debit cards, among several other online payment methods such as PayPal and Pay via Phone! 

Q. Does Agent of Hearts have Free Spins feature?

A. Yes! Agent of Hearts offers 1 free spin, which can be produced by any of the 4 Agent modifiers or when you unlock the Queen’s Heart and the bonus round is achieved.

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