Koi Princess slot
Koi Princess is a NetEnt slot from November 2015, played on 5 reels, 3 rows and 20 paylines. Its defining idea is choice by chance: four Random Features can switch on during any spin, and three Bonus symbols lead to one of four bonus features, ranging from two different free spins rounds to an instant coin prize and a three-tier Bonus Wheel.
Editorial note: this guide explains how Koi Princess works. Rules, features and payout figures are set by the studio and can differ between operators and game versions, so check the game’s information panel before you play. Slots are games of chance, and nothing here predicts results. Availability at Fortune Games can change.
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Koi Princess: key facts
| Studio | NetEnt |
|---|---|
| Released | November 2015 |
| Reels and paylines | 5 reels, 3 rows, 20 paylines |
| Random Features | One can start on any spin, never more than one at a time: 5-Hit (a five-of-a-kind win on a random line), Random Wild (4 to 9 overlay wilds), Wild Reels (2 to 5 reels covered by wilds) or Bonus Activation (three Bonus symbols) |
| Bonus Features | Three Bonus symbols on reels 1, 3 and 5 award one of four: Sure Win Free Spins, Wild Reels Free Spins, Coin Win or the Bonus Wheel |
| Sure Win Free Spins | 10 spins; the first pays at least the stake, and each later spin pays at least the largest win so far in the round |
| Wild Reels Free Spins | 10 spins; on each spin 1 to 5 random reels are covered by wilds |
| Bonus Wheel | Three tiers; awards coin prizes or one of the two free spins rounds |
| Bonus Wheel top prize | Up to 1,000x the bet that triggered the Bonus Wheel |
| Coin Win | An instant prize: the bet times a random multiplier |
| Bonus Bet | Optional; doubles the cost of a spin, from 20 coins to 40 at the same bet level |
| Top symbol | The wild |
| Autoplay and turbo | Not available at sites licensed in Great Britain; UK rules require at least 2.5 seconds between the start of one game cycle and the next |
| Stakes | From 20p a spin in the studio’s range. UK rules cap online slot stakes at £5 a spin, or £2 if you are 18 to 24 |
| RTP | Shown in the game’s information panel |
| Series | Stand-alone |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
How Koi Princess plays
Line wins are made the familiar way, with matching symbols along the 20 fixed paylines from left to right. The wild substitutes on the reels and is also the highest-paying symbol in its own right. The Bonus symbol is the one to watch: it only counts on reels 1, 3 and 5, and three of them together trigger one of the four bonus features, picked for you. You do not choose which one. What makes ordinary spins less predictable here is the Random Features layer, which can change a spin before it settles, so a quiet spin can still end with extra wilds or a full line of one symbol.
The Random Features
NetEnt built four of these, and the game can switch on one per spin at most. 5-Hit hands you a spin that is set to finish with a five-of-a-kind win on a random symbol and payline. Random Wild drops between four and nine overlay wilds across the reels. Wild Reels covers two to five whole reels with wilds for that spin. The fourth, Bonus Activation, does something different: it shows three Bonus symbols without any line wins and passes you straight into one of the bonus features.
Sure Win Free Spins and Wild Reels Free Spins
Two of the four bonus features are free spins rounds, and they work in opposite ways. Sure Win Free Spins start with 10 spins and set a floor under every result: the first spin pays at least your stake, and after that each spin pays at least the largest win the round has produced so far. Wild Reels Free Spins also give 10 spins, but here one to five reels, chosen again on every spin, are covered by wilds.
The Bonus Wheel and Coin Win
The other two bonus features pay prizes directly. Coin Win is the simplest of the four: it multiplies your bet by a random amount and pays it at once. The Bonus Wheel is built in three tiers, and moving around it lands on coin prizes or ends the game with one of the two free spins rounds. The highest value its top award can reach is listed in the key facts above. Coin Win and the wheel both work from the bet that set them off.
Koi Princess compared with Moon Princess
A princess theme also runs through Moon Princess, released in July 2017, but the two play very differently. Koi Princess keeps classic reels and paylines and leaves its surprises to Random Features and a bonus draw. Moon Princess uses a 5x5 grid where wins drop away and new symbols fall in, and under its Girl Power theme three princesses can step in at random, changing symbols, adding wilds or clearing groups from the grid.
| Game | Released | Grid and lines | Main feature |
|---|---|---|---|
| Koi Princess | November 2015 | 5x3, 20 paylines | Random Features and four Bonus Features |
| Moon Princess | July 2017 | 5x5 grid | Girl Power: three princess powers that change the grid at random |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
Koi Princess at Fortune Games
Koi Princess is part of the NetEnt collection in the Fortune Games slots lobby (18+). The UK caps in the table apply to every player. There is no autoplay or turbo mode, as at every site licensed in Great Britain. Fortune Games has an app on the App Store and Google Play.
Frequently asked questions
How do you get the bonus features in Koi Princess?
Land three Bonus symbols, one each on reels 1, 3 and 5. The game then gives you one of four features: Sure Win Free Spins, Wild Reels Free Spins, Coin Win or the Bonus Wheel. There is a second route as well, because the Bonus Activation random feature can deliver the three symbols on any spin.
What is special about Sure Win Free Spins?
Every spin in the round has a minimum payout. On the first spin it equals your stake; after that it rises to the largest single win you have had in the round. The round starts with 10 spins, and it is one of four bonus features that three Bonus symbols can award at random.
Does the Bonus Bet change how Koi Princess plays?
It doubles what each spin costs, from 20 coins to 40 at the same bet level. Because the first Sure Win Free Spin pays at least the amount wagered, the game rules set that first minimum at 40 coins when the Bonus Bet is on. It is optional. Whatever you choose, the total stake for the spin still has to sit within the UK limits shown in the key facts.
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Checked on 10 November 2026 against NetEnt’s game page for Koi Princess, the VegasSlotsOnline, Adventure Gamers and PokerListings records of Koi Princess, Play’n GO’s game page and the SlotCatalog record for Moon Princess, and the Gambling Commission’s stake-limit guidance and remote technical standards. How we research and check our guides: our editorial policy.