With so many pokies available at online casinos, it is really hard to find those that have double up slot feature.
There are hundreds of attractive features available, but the classic “Red or Black” gamble feature remains the most exciting way to turn a small win into a huge payout.
Our expert team has tested over 200 real money pokies available in NZ to come up with a list of the best double up slot games for 2026.
What is a double up slot?
A double up slot (gamble feature pokies’ in NZ) allows players to risk their win from a spin for a chance to double or quadruple it, usually by guessing a lower/higher number or card colour or suit.
In most double up slot NZ machines, players will havethe option to choose between:
- The colour: Guess Red or Black to double up your win.
- The suit: Guess hearts, spades, diamonds, or clubs to quadruple your win.
- The number: Guess a higher or lower number to double your win.
Pros
- 0% house edge: A true 50/50 chance.
- Quick gains: Turn a $5 win into $20 in seconds
- Strategy: Best option for high volatility slot games.
Cons
- High risk: One wrong guess – the win is gone.
- Emotional play: It’s easy to get carried away.
- Wagering: Doesn’t count toward bonus clearing.
Best double up slot machines for NZ Players (2026 List)
Here we have listed the top 15 best double up slot. During our reviews, we have focused not just on doubling up but on all other features, including RTP, free spins, bonus play, volatility, design, number of reels, and provider background info.
Here are the top double up slot games available at new zealand online casinos:
| Slot | RTP% | Provider | Volatility |
|---|---|---|---|
| Pearls of India | 96.87% | Play’n GO | High |
| Hugo Goal | 96.49% | Play’n GO | Medium |
| Inferno Star | 96.38% | Play’n GO | High |
| Inferno Joker | 96.38% | Play’n GO | High |
| Medusa Megaways | 96.28% | NextGen | Very High |
| Book of Dead | 96.21% | Play’n GO | High |
| Doom of Egypt | 96.20% | Play’n GO | High |
| Golden Caravan | 96.19% | Play’n GO | High |
| Wild Blood | 96.17% | Play’n GO | Medium |
| Cabin Fever | 96.15% | Microgaming | Medium |
| Mystical Santa Megaways | 96.11% | StakeLogic | High |
| Double Play Superbet | 95.00% | NextGen | High (Adjustable) |
| Game of Thrones Megaways | 94.86% | Microgaming | Very High |
| Star Joker | 94.23% | Play’n GO | Low |
| Esmeralda | 92.43% | Playtech | Medium |
All pokies features, including the double up feature that we have listed here, are hand-checked and verified bythe CasinoBlacks team at Leo Vegas, Hell Spin, JackpotCity and other quality casinos in nz
Top 6 double up slot in NZ
Now that we have listed the top 15 best double-up slot games for 2026 in NZ, in this section, we will talk a little more about the top ones according to us and give you important details and tips about their double-up gamble features. So let’s get started.
| If you are not sure how online slots work, read our guide where you can learn how to play slots. |
1. Book of Dead (Red or Black)
Book of Dead is a popular slot game available online and offline in land-based casinos. This is an Egypt-themed slot launched in 2016 by Play’n Go. This is a slot game with an RTP percentage of 96.21% and high volatility, and besides bonus games, free spins, wilds, and scatter it offers a gamble feature called a double up.
After winning, a combination of symbols lands in your reels, you will get the option to gamble your winnings. If you decide to gamble your winnings, the game takes you to a new screen where you guess the colour of the cards or suits.
You have the option to gamble up to 5x or up to 2,500 coins, while for each hit of colour the payout is 2x and for each hit of suits the payout is 4x.
Book of Dead features:
- Bonus Rounds: Yes
- Wilds: Yes
- Multipliers: Yes
- Free Spins: Yes
- Scatter: Yes
- Paylines: 10
- Reels: 5
- Jackpot: Yes
- Gamble feature: Yes
2. Inferno Star (Color or Suit)
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After each win at the Inferno Star slot game, the double-up slot feature will be activated, and you will have the opportunity to collect or gamble your winnings.
The gambling feature on this slot is identical to that on the Book of Dead. After winning, you can choose to collect or gamble your winnings. If you decide to gamble, you will have to guess the colour or suit of the card that should come out. You have the option of choosing a colour, and if you win the slot, you get paid 2x. If you decide to guess the second option, suits, the game pays 4x for each hit.
Inferno Star features:
- Bonus Rounds: No
- Wilds: No
- Multipliers: No
- Free Spins: No
- Scatter: Yes
- Paylines: 10
- Reels: 5
- Jackpot: Yes
- Gamble feature: Yes
3. Star Joker
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The gambling function in this slot works in such a way that you have to guess the colour or the suits of the dealt card. If you guess, the winnings will automatically double. Hitting the right colour pays you 2x while hitting the right suit pays you 4x.
In the same way as on the above-listed slots, we just need to say that the graphics and the colours on these pokies are really great and astonishing. If you hit the colour of the dealt card, the slot pays you 2x; if you hit the suits, the slot doubles your winnings 4x.
Star Joker slot features:
- Bonus Rounds: Yes
- Wilds: Yes
- Multipliers: Yes
- Free Spins: Yes
- Scatter: Yes
- Paylines: 10
- Reels: 5
- Jackpot: No
- Gamble feature: Yes
4. Doom of Egypt
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Once you hit a combination on the slot wheels, you will have the option to double up or collect your winnings. If you decide to gamble, you have the option to choose a colour or suits. If you guess the colour, your dog plays 2: 1, while if you guess the suits, the game pays you 4: 1.
Doom of Egypt slot game features:
- Bonus Rounds: No
- Wilds: No
- Multipliers: No
- Free Spins: No
- Scatter: Yes
- Paylines: 10
- Reels: 5
- Jackpot: No
- Gamble feature: Yes
5. Game of Thrones 243 Megaways (Heads or Tails)
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Whenever a player wins during the game, he will be offered the option of doubling up. This option in this slot is slightly different from the ones listed so far. Namely, here we need to guess one of the two sides of the coin. Choose heads or tails and double your winnings 2: 1 each time.
Game of Thrones 243 Megaways features:
- Bonus Rounds: No
- Wilds: Yes
- Multipliers: Yes
- Free Spins: Yes
- Scatter: Yes
- Paylines: 243
- Reels: 5
- Jackpot: No
- Gamble feature: Yes
6. Rooster Fury (Higher or Lower)
Rooster Fury is 3 reels, 3-row slot game with an RTP percentage of 96%. Volatility is low variance, and this game has 5 fixed pay lines. There are many interesting features, such as a bonus game with free spins (30 + free spins) in 5 rounds. There is also a risk game or gamble feature where players, after each win, can double their winnings multiple times. Learn how to use this feature and find out more about the Rooster Fury slot game.
Rooster Fury features:
- Bonus Rounds: Yes
- Wilds: Yes
- Multipliers: No
- Free Spins: Yes
- Scatter: Yes
- Paylines: 5
- Reels: 3
- Jackpot: No
- Gamble feature: Yes
How the double up feature works
Slots with a gamble feature offer players a 50/50 chance to double their winnings, with a 1 in 4 chance of quadrupling them if they hit. If you lose, that is, if you incorrectly predict the next outcome, all your winnings are lost.
The classic feature uses a common deck of cards, where the player has to guess whether the next card drawn will be red or black, what suit it will be, and whether it will be higher or lower.
After each win, players have the option to collect or continue to double.
New double up casino games
Besides slots, online casinos have other games that have double up as an installed feature. Some of the latest games with this feature include:
| Game type | Tittle | Gambling feature | RTP |
|---|---|---|---|
| Video Poker | Jacks or Better | “High or Low” card guess after any winning hand. | 99.54% |
| Blackjack | Double Up Blackjack | Allows you to double your bet on any two cards. | 99.10% |
| Video Poker | Joker Poker | Guess the colour (Red/Black) or Suit to 2x or 4x your win. | 98.60% |
| Table Games | 10p Roulette | Use the “Gamble Ladder” to double your winnings on outside bets. | 97.30% |
| Instant Win | Dazzling Sun (Ladder) | A “Skill-based” ladder climb where you click to double your prize. | 96.59% |
| Live Dealer | Lightning Blackjack | Uses multipliers that essentially “double” your next hand’s value. | 99.50% |
Always play responsible
These kinds of features are high-adrenaline, and players should always use them when gambling on small wins (less than 5x their bet). Don’t gamble with an amount you’re not willing to lose. If you feel like you’re losing control, help is available locally:
- Gambling Helpline NZ: 0800 654 655
- SMS: 8006
FAQ
Is the double up slot feature rigged?
No, all games at licensed online casinos use Random Number Generator that is also called RNG. All outcomes are random and the slot games are not affected by previous wins.
What is the highest RTP double-up slot?
The higest RTP slot game that have double up feature based on our real test data are Mega Joker and Book of 99. Both of these two slots have RTP 99%.