Koi Princess
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Koi Princess Slot Machine

One of a number of oriental themed slots, Koi Princess is a five reel and three row game with a theoretical return to player percentage of between 96% and 96.23%. What really sets this 20 payline slot apart however, is its plentiful selection of extra and bonus features, which include wild substitutions, random features, a bonus game and plenty more besides.

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Koi Princess Review

Game info

Payout %:96.23
Pay Lines:20
Max Win:100,000
Wild:Crashing Waves
Our Rating:3.9 / 5

Koi Princess is a very involved slot game which packs a great many additional features into its gameplay. Below you will find a brief guide which attempts to provide the key details of the game’s top jackpot, some of its special symbols, the paytable and players’ betting options.

Top Jackpot

The many additional features of the Koi Princess slot game provide players with the chance to win coins and cash in a number of different ways. The top jackpot, however, results from a spin within the normal game that reveals the most valuable combination of five Wild symbols along all of the game’s 20 pre-set paylines.

That five Wild symbol combination pays returns at a rate of 500 times the bet level and as such, at bet level ten provides winnings of 5000 coins per line. If all 20 lines were to display the same combination, therefore, the top jackpot of a full 100,000 coins would be won. At the maximum possible coin value of £1 that jackpot can be worth an impressive £100,000 to the winner.


Koi Princess is no ordinary slot as it has a huge range of special features and bonuses. There are far too many to cover in great detail here but we will attempt to at least mention them all and to point you to where you can find out exactly how each of them works.

Special Symbols

Wild Symbol – firstly, Koi Princess features Wild symbols which work in the same way as those found in most slots games. That is by substituting for all other symbols except for the bonus symbol, to go towards making up the most valuable possible combination for any winning payline.

Bonus Symbol – as touched upon above, this slot also features Bonus symbols which can activate one of four ‘Bonus Features’ if three appear on reels 1, 3 and 5 after a spin. To select which bonus feature is activated, the player must click the ‘Bonus Feature Wheel’ and if they don’t do so within 90 seconds a feature is chosen automatically.

The ‘Bonus Features’ are called ‘Sure Win Free Spins’, ‘Wild Reels Free Spins’, ‘Coin Win’ and ‘Bonus Wheel’. The first two are variants of free spins, the third provides immediate coin wins and the fourth is a wheel based bonus game. More in-depth explanations of how each of these features work can be found within the game’s help section and paytable.

As well as those numerous ‘Bonus Features’, Koi Princess also boasts four different ‘Random Features’, which can be activated randomly after any spin, and a ‘Bonus Bet Mode’. The ‘Random Features’ are named ‘5-Hit’, ‘Random Wilds’, ‘Wild Reels’ and ‘Bonus Game’, and once again the best place to find all of the details of how each works, is within the game’s paytable.

Koi Princess’ ‘Bonus Bet Mode’ gives players the opportunity to double their bet for any particular spin in order to increase the probability of the ‘Random’ or ‘Bonus’ features being awarded. It is enabling this mode which can increase the game’s theoretical RTP percentage from 96% to 96.23%.

Regular Symbols

It should be apparent by now that the main selling point of Koi Princess is its huge selection of additional features, games and bonuses. There is still a normal slot included amongst it all, however, and potentially lucrative jackpots to be won by achieving five symbol winning combinations along the game’s 20 pre-set paylines.

The most valuable combination within the game is made up of five of the Wild symbols and that combination pays out at a rate of 500 times the bet level. At the maximum bet level of ten, therefore, that combination can provide winnings of 5000 coins per line.

The next most valuable combination of the game is that made up of five of the Koi Princess symbols and those combinations pay at a rate of 400 times the bet level.

Betting Limits

As well as enjoying a whole host of features and bonuses, Koi Princess players are also offered good control over their stake amount per spin. Both the bet level and the coin value of each spin can be chosen to set the number of coins wagered per line and the value of those coins, respectively.

There are ten bet levels from 1-10 which each add one coin per line from the minimum of one, and seven coin values from 1p to £1. If a player wants to bet the minimum amount, therefore, they can choose a bet level of one coin per line and a coin value of 1p, and wager a total of just 20p. If they wish to bet the maximum, meanwhile, they can choose a bet level of ten coins per line and a coin value of £1 to stake a total of £200.

What We Think

Koi PrincessIf a player is looking for a slot game with exciting gameplay and enough added features that they can play it over and over again without doing exactly the same thing twice, then they can do no better than choosing Koi Princess.

The slot packs in far more bonus games, special features and additional functions than almost any other around, and all of them offer players different opportunities to boost their potential winnings. Those potential jackpots are comparatively impressive too, with the top payline jackpot of 5000 coins per line measuring up well to most other games, even before the additional features are taken into account.

Players too, are given a good level of control over their betting amounts within Koi Princess, to complete what is a very impressive slot. The only potential weakness of the game, however, is that it can take a good amount of time and effort for a player to actually fully understand how all of the functions work.

This game has a rating of 4 / 5 with 386 total reviews by .

Author Info

Written by: Sam Jones

Sam is an author here at AllOutSlots.com with her specialty firmly lying in slot and casino reviews (she does have a wealth of experience after all) - more info about our team...