| Provider | NetEnt |
|---|---|
| RTP | 95.72% - Compare RTPs |
| Volatility | High |
| Reels | 5 |
| Paylines | 20 |
| Bet Range | £0.20 - £200.00 |
| Hit Frequency | 29.44% |
| Max Win | 10,806x |
| Features | Wilds, Scatters, Bonus Rounds |
Koi Princess Slot Review
Koi Princess is a five-reel, 20-payline slot from NetEnt built around a Japanese anime theme. Released in November 2015, it was NetEnt's first slot to use a manga-inspired visual style - and it remains one of the most feature-packed games in the studio's catalogue. With nine distinct bonus features across two tiers, it gives players considerably more variety than the typical NetEnt release.
The game runs on a 5x3 grid with 20 fixed paylines. Bets range from £0.20 to £200 per spin, though the Bonus Bet option doubles your stake. RTP sits at 96.00% at standard bets, rising to 96.23% when the Bonus Bet is active. Volatility is medium.
Theme and Design
The setting is a Japanese garden at dusk. A waterfall cascades behind the reels, with a stone temple visible through cherry blossom trees. The Koi Princess herself stands to the left of the grid - an anime-style character who reacts to what happens on the reels, glancing across with a mix of anticipation and approval as wins land.
Symbols include the Koi Princess logo (the highest-paying regular symbol at 20x stake for five), a dragon, a turtle, and Chinese coins. The wild is a crashing wave and substitutes for all symbols except the golden dragon's head, which is the bonus scatter. The lower-value symbols are the standard playing card ranks from Ten to Ace. The overall presentation is cleaner than most anime-themed slots of the era - it does not try too hard, and the restraint works in its favour.
Game Details at a Glance
- Developer: NetEnt
- Released: November 2015
- Reels / Rows / Paylines: 5 reels, 3 rows, 20 fixed paylines
- RTP (standard): 96.00%
- RTP (Bonus Bet active): 96.23%
- Volatility: Medium
- Bet range: £0.20 - £200 per spin
- Max win: 1,000x stake
The Bonus Bet
Before spinning, you can activate the Bonus Bet. This doubles your total stake but increases the frequency of both the random base-game features and the full bonus round. It also improves payouts in certain parts of the bonus. If you want the game's features to fire more regularly, the Bonus Bet is the way to do it - but keep in mind it means every spin costs twice as much. The standard RTP rises from 96.00% to 96.23% with it on, so there is a marginal mathematical benefit too.
The Five Random Features
Five random features can trigger at any point during the base game, regardless of what lands on the reels. You'll see three Koi fish appear on screen - choose one to reveal which feature activates.
- 5-Hit Feature: Awards one free spin with a guaranteed five-of-a-kind win. A useful floor on what you receive.
- Random Wild Feature: Awards one free spin with between four and nine overlay wilds scattered across the reels. The more wilds, the better your chances of multiple simultaneous wins.
- Wild Reels Feature: Awards one free spin with two to five entire reels going wild. When four or five reels turn wild, the results can be substantial.
- Coin Win Feature: Awards a direct cash prize without any spins required.
- Bonus Activation Feature: Drops three bonus symbols onto reels 1, 3 and 5, immediately triggering the Bonus Game.
The Bonus Activation feature is the one to watch for - it bypasses the scatter requirement entirely and sends you straight into the bonus round. With the Bonus Bet active, random features fire noticeably more often.
The Bonus Game Picker
The standard way to reach the bonus is landing the golden dragon's head scatter symbol on reels 1, 3 and 5 simultaneously. Once triggered, a spinning wheel determines which of four bonus modes you play.
- Sure Win Free Spins: Ten free spins where every spin produces a win. Each subsequent win must equal or exceed the value of the previous one, so the session can build steadily if the early wins are reasonable. This is the most consistent of the four options.
- Wild Reels Free Spins: Ten free spins with one to five reels turning wild on each spin. The number of wild reels is random per spin, so outcomes vary considerably - but a run of five-wild-reel spins can push the total quickly.
- Bonus Wheel: A three-segment wheel that can award coin prizes directly or activate either of the two free spins rounds. The outer ring of the wheel offers the smaller cash amounts; reaching the centre pays a larger prize. If you'd rather take a coin payout and avoid the variance of free spins, the Bonus Wheel occasionally delivers that.
- Coin Win: An instant cash prize is awarded and the bonus ends. This is the shortest outcome and provides no additional spins, but it does give a guaranteed payout with no further variance.
Which bonus you get is decided by the wheel, not by choice - though with the Bonus Bet active, payouts in the wheel segments and Sure Win Free Spins are improved.
How to Play
Set your coin value and bet level using the controls below the reels, then hit Spin or use Autoplay for between 10 and 1,000 automated spins. The game is not technically demanding - the complexity is in understanding the features rather than managing controls. One thing worth doing before your first session is reading through the paytable, since the overlap between the random features and the bonus game picker is not immediately obvious and it helps to know what each trigger produces before it fires.
Mobile Play
Koi Princess runs in HTML5, so it loads directly in the browser on any device without needing a separate app. The interface scales cleanly to smaller screens - the control panel collapses neatly below the grid, and the feature animations play without issue. NetEnt has kept the game in its active portfolio since 2015, which means it has been maintained and updated for current mobile standards. It plays comfortably on both phones and tablets.
Who Is Koi Princess For?
Koi Princess suits players who want a busy feature set without the extreme variance of high-volatility slots. Medium volatility means wins land at a reasonable frequency in the base game, and the random features add a layer of expectation to every spin - any of them can fire at any moment. The Sure Win Free Spins mode is particularly appealing if you prefer a bonus that builds incrementally rather than relying on lucky multiplier clusters.
The Bonus Bet is worth considering if your budget allows. The increased feature frequency changes how the session feels considerably, and the marginal RTP improvement (96.23% vs 96.00%) gives it a slight mathematical edge. But doubling your stake is a real cost, so only use it at a bet level you're comfortable maintaining.
For players interested in other NetEnt slots, Koi Princess occupies a distinct space - it has more bonus variety than Starburst, more player interaction than Gonzo's Quest, and a more controlled volatility than Dead or Alive. If you want to explore online casinos where Koi Princess is available, the listings on this site include the platforms that carry it.
Frequently Asked Questions
What is the RTP of Koi Princess?
Koi Princess has an RTP of 96.00% at standard bets. Activating the optional Bonus Bet raises the RTP marginally to 96.23%.
What volatility is Koi Princess?
Koi Princess is a medium-volatility slot. Wins land at a reasonable frequency in the base game, and the random features can trigger on any spin.
How do you trigger the Koi Princess bonus game?
The bonus game triggers by landing the golden dragon's head scatter on reels 1, 3 and 5 simultaneously. It can also be triggered by the Bonus Activation random feature, which places three bonus symbols directly onto the correct reels without needing them to land naturally.
What is the Bonus Bet in Koi Princess?
The Bonus Bet is an optional feature that doubles your stake per spin. In return, it increases how often the five random base-game features trigger, improves payouts in certain bonus modes, and raises the RTP from 96.00% to 96.23%.
Can I play Koi Princess on mobile?
Yes. Koi Princess runs in HTML5 and loads directly in the browser on phones and tablets without needing a separate app. The layout and controls scale cleanly to smaller screens.
Who made Koi Princess?
Koi Princess was developed by NetEnt and released in November 2015. It was NetEnt's first slot to use a Japanese anime visual style.
Where to Play Koi Princess
These online casinos carry NetEnt games including Koi Princess. Read our Donbet review or browse all casino reviews.
Koi Princess RTP and Variance
Koi Princess has an RTP of 95.72%, which is around the industry average. See our highest RTP slots for the best returning games. High volatility means wins come less often but tend to be significantly larger. Explore our high volatility slots guide.
At the minimum bet of £0.20 per spin, a £10 deposit gives you 50 spins with a statistical expected return of £9.57. Read our slot betting strategy guide for tips on managing your bankroll.
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