Ninja Slot - Review, Free & Demo Play logo

Ninja Slot - Review, Free & Demo Play


Learn all secrets about ninjas together with the Ninja slot from Endorphina, released on 15/02/2015. This dynamic game can bring a lot of excitement and some great wins for players. And if you want to improve your chances of succeeding in the slot, read our detailed review of it.

Software: Endorphina
Release Date: 15.02.2015
Volatility: High
RTP: 96.0%
Multiplier: Yes
Max. win: 40,000x
Bonus game: No
Free spins: Yes
Scatter Symbol: No
Wild symbol: Yes
Symbol Stacked: No
Jackpot Game: No
Slot lines: 20
Slot reels: 5
Layout: 5-3
Stakes range (€/£/$): 0.20 to 200
Slot Theme: Ninjas
Technology: HTML5

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Ninja Free Play

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Finding a safe and reliable online club to play Ninja slot for real money is a super easy task! You can find the list of best casinos that contain this game in the lobby in this section. All these brands were selected automatically by the intelligent system of our website.

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How to Play

Check a step-by-step guide to start playing the Ninja;

  1. Enter the casino, sign in/sign up, and deposit funds
  2. Find the spinner in the lobby
  3. Settle your stake with a “coin value” and “Bet” section. The minimum overall bet per spin is €0.20, while the max is €200
  4. Check the paytable and rules if you want to
  5. Make needed adjustments in the game settings
  6. Start spinning. You can roll the slot manually with the spin button/spacebar or automatically with the “AUTO” option

Ninja is a pretty straightforward game with a 5x3 board and 20 fixed paylines. The slot pays from left to right on adjacent reels. All winning lines must start from the far-left cell.

Two main features of the game are gamble round and free spins.

Ninja RTP and Volatility

Ninja is a high-variance slot with an RTP of 96.02%.

The win size from spin to spin can vary significantly in the Ninja. The slot’s paytable is unbalanced, as the highest-paid element is 70 times more valuable than the lowest-pay one. You can easily go on a durable down streak and then, out of a sudden, get an 100x payout. Free spins are also volatile, as you never know how long they will take – it can be 2-3 or 20+ spins.

The slot’s RTP is 96.02%. The level of payback in the gamble round is 84%.




The slot’s title speaks for itself. The game is about ninjas, secretive men that have a special place in Japanese culture.

The slot is quite dynamic and colorful, which is strange given the central theme. Every winning line is followed by animation and a soundtrack. And there is a flashy animation of a ninja hitting the gaming board during free spins. Only the background picture gives some mysterious vibes with its dark-blue tones.

Only 8 different symbols are present in the game, with 7 being regular-pay.

The list of regular elements with their odds is available below:

  • Knuckles, hooks with a red feather: 0.25x, 0.75x, 3.75x;
  • Shuriken: 0.25x, 1x, 5x;
  • Nunchaku: 0.25x, 1.5x, 10x;
  • Yellow ninja: 0.75x, 2.5x, 25x;
  • Red ninja: 1x, 3.75x, 37.5x;
  • Blue ninja: 5x, 25x, 250x.

The slot’s special element is Black Ninja (wild). It substitutes other symbols on the reels and triggers (3+ wilds) free spins. Also, 2+ wilds on reels refill wild accumulator for future free spins.

Ninja Slot - Paytable

Mobile Compatibility

Endorphina released the Ninja slot back in 2015 on FLASH technology. Despite that, you can still play the game on your mobile device, as the provider converted it into HTML5 format in 2020. Every owner of a modern smartphone or tablet can enjoy the slot.

The mobile version of the Ninja provides players with an adaptive UI that supports all visuals, graphics, and functions. With a few taps, you can change the bet size, adjust game settings, or set the number of auto-plays.

About Endorphina

Endorphina is a popular casino game developer from the Czech Republic. This MGA-licensed provider was founded in 2012, and now it has a big portfolio of 100+ games.

Endorphina focuses mainly on releasing slots with classical mechanics and straightforward gameplay. The provider has also produced controversial games, like Taboo, Twerk, Geisha, Maori, etc. Those provocative releases helped the company to get attention and recognition in the industry.

Endorphina continues releasing new slots every month, reaching more and more casinos. And players like the company’s games, especially classic ones like Hit Slot or Joker Stoker.

Bonus Rounds & Free Spins


Two main features of the slot are gamble round free spins.


You can increase your winnings in the risk game. Press on the red card on the control panel to start the round.

After activating the gamble feature, you will see a board with 5 cards. The first card is the dealer’s one, and it’s open. The following four cards are facedown. You have to pick one of four facedown cards to reveal its value. If your selected card beats the dealer, your winnings will be doubled; the dealer’s win = losing all your winnings.

You can play up to 10 sequences in one risk game.

Note that you can leave the risk game after seeing the dealer’s card. Your chances of beating him vary from 162% to 42%, depending on the value of the dealer’s hand.

Free Spins

You can activate free spins by landing at least 3 dark ninjas.

There is no definite quantity of free spins. The only certain value is the number of wilds appearing during the FS round. The number of wilds during the FS is determined in the base game. Each time you land at least 2 ninjas in the main round, they refill the wild accumulator:

  • 2 black ninjas accumulate 2 wild elements;
  • 3 ninjas – 5 wilds;
  • 4 ninjas – 30 wilds;
  • 5 ninjas – 100 wilds.

Note that for different bet levels, wild symbols accumulate separately.

During the FS, all accumulated wilds will appear on the reel. The thing is that you never know how wilds will be distributed. For example, you can get 10 symbols during one spin and only 1 wild during the next.

Another part of the FS round is the Ninja feature. After the end of each spin, the ninja comes closer to reels and starts hitting symbols. If he hits a high-pay element (other ninjas), an 2x multiplier will appear on that spot; if he hits a low-pay element (weapon), an additional wild will appear. Note that multipliers multiply each other.
Ninja Slot - Free Spins

Ninja Demo Play

It’s better to play the Ninja slot once than read about it a thousand times. But what if you don’t want to risk your money? In that case, the slot’s demo version is the best option. And it’s available here for every visitor.

During the demo session, you will be betting with a virtual (FUN) balance. It’s not real money, and all your winnings will be virtual too. But demo play is not about winning. It’s nothing more than a training ground to prepare for the money game.

Max Win

The maximum theoretical win in the slot is 40,000x.

The max win in the main game is 5,000x. You can reach it by filling the entire board with a blue ninja symbol. You can get an additional multiplier (up to 8x) during the free spins, so the maximum theoretical win here is higher.

Of course, odds like 5,000x and 40,000x are reachable on paper. In reality, even 1,000x is a massive win for the Ninja slot. The FS round is more suitable for big hits due to additional multipliers and wilds.

Other quality slots with high max. wins:
Overall Rating
The Ninja offers simple gameplay, but you cannot call this slot boring. Every spin here counts as you can collect wild symbols for future free spins. And who knows, maybe you’ll be lucky to get 5 black ninjas to get 100 wilds! Try the slot and share your opinion in the comments section.
Free spins with additional wild and multipliers
The gamble feature
The slot has the potential for significant wins
No bonus buy
It can be streaky at times


For how long do free spins last in the Ninja?
Free spins last until you are out of wild symbols you previously collected in the main round.
Does this slot have a jackpot?
There are no jackpot wins in the Ninja slot.
How to activate a fast spin mode?
Click on the turbo button on the control panel.

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Ella Houghton

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Ella is a professional content-writer with 8 years of experience in the casino sphere. She has broad knowledge of gambling related themes and is happy to share this with Slotsjudge.

Reviewed by Editor-in-Chief:
Aleksandra Andrishak
Updated: 01.08.2023

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