Risk/Gamble/Double-up Slots, Best RTP Slot Games (2026)
Updated: June 15, 2026
The risk feature in online slots allows you to increase the winnings you receive as a result of a spin. Generally, once a spin has been completed and a payout has been credited you can click on 'Gamble' and enter a mini round where you will be asked to select a closed card that is higher than the one the slot has chosen. This feature is available in quite a few slots and does not affect the RTP in any way.
Slot machines have won the love of many gamblers. That is why the leading manufacturers are trying to make them more interesting and exciting. This applies not only to the choice of original plots but also to the additional features of the slot machines. Modern online slots surprise interesting bonus games, large jackpots, the presence of special characters. However, the most original is the gamble features that allow players to increase their winnings by several times.
This option came about at a time when slots migrated from machine shops to land-based casinos. Many slot makers wanted to draw maximum attention to their creations, so they came up with a variety of prize options that could help potential players win more. At online casinos, this option became available as soon as the first online slots appeared. It is worth noting that the first video poker variants were the progenitors of this option. No doubt, there are far more interesting and advanced revenue-generating features available today; however, the video poker feature is still very popular. The fact is that this option gives the player the opportunity to increase his winnings in just one click.
Gamble Feature Slots List (798)
How does risk (gamble) feature work?
The doubling game can be activated after another winning combination. It is up to the player to decide whether or not to take part in the game. As a rule, to start the risk game, the "Double", "Risk" or "Gamble" key must be pressed. Once the risk game is started, the user has only one decision to make. He can win and double his winnings or lose and lose the money he previously earned.
As a rule, the odds of winning and losing are identical. Most online slots offer the risk of risking all of your winnings. On rare occasions, the player may only gamble half of his winnings. One of the key features of the doubling game is that it can be played no more than 5 times in a row or until you lose.
If the first round of doubling is successful, the prize for the winning combination on the reels is doubled. Otherwise, the entire amount at stake is forfeited, and the online slot user returns to the game with the remaining funds in his bankroll.
Since a similar bonus round was originally used in a poker machine, most doubling up games in classic slot machines use card assignments and a similar style. A typical one is to guess the colour of a 'hidden' card.
Guessing a suit is also an option. Since there are four suits, the riskiness of the task increases, which also affects the reward, which in this case consists of multiplying the prize bet by four. A typical round is also with the search for a card that can "beat" the dealer's open card (played by the online slot you have chosen).
It is common to increase your winnings step by step in the risk feature slots allow several times in a row. The risk feature can be interrupted in three cases:
First, the player has the right to refuse further doubling and collect his winnings
Secondly, a wrong choice can end the adventure, which nullifies the user's winnings
Thirdly, some slots have a limit on doubling your winnings. However, more often than not there is no limit.
Of course, if you play slots and regularly use the gamble feature, the chance of increasing your bankroll is much higher. However, you can't forget to be careful: you can lose your money much faster this way, too.
Should you use gamble feature?
You can use the gamble feature when you want to. This is not a mandatory condition. The gamble feature has no effect on your RTP and as a consequence, you can run it whenever you want. For instance, when you wish to increase the winnings you get as a result of a spin. The funds received as a result of the doubling round will be credited to your account when you stop the game and start a new spin.
In each slot, this option can have a different appearance. Many developers have decided to add some variety to this round, and each of them has tried to make the option unique. For example, somewhere it could be barrels that need to be opened or horseshoes that need to be picked and as a result, the number of winnings will be doubled.
Best 3 Gamble Feature Slots Comparison
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|---|---|---|---|
| Provider | Netent | Netent | Amatic |
| RTP | 99.0% | 98.9% | 97.63% |
| Volatility | High | High | High |
| Max Win | x200 | x600 | N/A |
| Released Date | Oct. 1, 2008 | Dec. 24, 2007 | Nov. 15, 2014 |
| Paylines | 5 | 5 | 10 |
| Free Spins | 10 | ||
| Buy Free Spins | |||
| Multipliers | |||
| Wild Symbol | |||
| Scatter | |||
| Other Features |
Autoplay, In-Game Jackpot, Progressive JAckpot, Gamble Feature, Win Both Ways |
Autoplay, Gamble Feature, Win Both Ways, Respin |
Autoplay, Gamble Feature |
| Play For Free | Demo Play | Demo Play | Demo Play |
| Real Money Play |
Gamble Feature (Double-Up) Slots List
| # Slot Name | RTP % | Volatility | Max Win | Casinos List |
|---|---|---|---|---|
| 1. Mega Joker | 99.0 % | High | x200 | Casinos List |
| 2. Jackpot 6000 | 98.9 % | High | x600 | Casinos List |
| 3. Book of Aztec | 97.63 % | High | x5,000 | Casinos List |
| 4. Book of Fortune | 97.63 % | High | N/A | Casinos List |
| 5. Diamond Monkey | 97.49 % | Medium | x1,000 | Casinos List |
| 6. Jokers Million | 97.34 % | Medium-high | x3,000 | Casinos List |
| 7. Lucky Lady's Clover | 97.31 % | Medium | x10,000 | Casinos List |
| 8. Magic Owl | 97.23 % | Medium | N/A | Casinos List |
| 9. Royal Unicorn | 97.23 % | Medium | N/A | Casinos List |
| 10. Dragons Kingdom | 97.23 % | Medium | N/A | Casinos List |
| 11. Billy's Game | 97.21 % | Medium-low | x1,000 | Casinos List |
| 12. 40 Charming Joker | 97.19 % | Medium | x1,000 | Casinos List |
| 13. Magic Forest | 97.18 % | Medium | N/A | Casinos List |
| 14. Fire and Ice | 97.15 % | Medium | N/A | Casinos List |
| 15. Rage to Riches | 97.12 % | Low | x100 | Casinos List |
| 16. Bells on Fire Rombo | 97.12 % | Medium | N/A | Casinos List |
| 17. Fruit Million Summe… | 97.1 % | Medium | x3,000 | Casinos List |
| 18. Fortune Bells | 97.09 % | High | x4,684 | Casinos List |
| 19. Vampires | 97.07 % | Medium | N/A | Casinos List |
| 20. Grand X | 97.05 % | Medium | N/A | Casinos List |
| 21. 10 Shining Diamond | 97.04 % | Medium-low | x1,500 | Casinos List |
| 22. Gods Of Egypt | 97.01 % | Medium | x3,000 | Casinos List |
| 23. 5 Burning Roll | 97.01 % | Medium-low | x1,200 | Casinos List |
| 24. Ambassador | 97.0 % | Medium | x5,000 | Casinos List |
| 25. Joker 10000 Deluxe | 97.0 % | High | x10,000 | Casinos List |
| 26. Big Spinner | 97.0 % | Medium-high | x10,000 | Casinos List |
| 27. Flaming Fruit | 97.0 % | Low | x64 | Casinos List |
| 28. Admiral Nelson | 97.0 % | Medium | N/A | Casinos List |
| 29. Lucky Lady Moon | 97.0 % | High | x27,000 | Casinos List |
| 30. All Lucky Clovers | 97.0 % | High | x3,000 | Casinos List |
| 31. Lucky Swing | 97.0 % | Medium | x1,500 | Casinos List |
| 32. Truckers Heaven | 97.0 % | Medium | x5,000 | Casinos List |
| 33. Joker 10000 | 97.0 % | High | x10,000 | Casinos List |
| 34. Book of Cats | 96.99 % | Extreme | x8,202 | Casinos List |
| 35. Golden Book | 96.97 % | Medium | N/A | Casinos List |
| 36. Mummy's Gold | 96.96 % | Low | x5,000 | Casinos List |
| 37. Aztec Magic Deluxe | 96.96 % | Low | x5,000 | Casinos List |
| 38. Hermes Fortune 2000… | 96.95 % | High | x25,000 | Casinos List |
| 39. Dragon's Gold 100 | 96.9 % | High | x3,000 | Casinos List |
| 40. Gold Trophy 2 | 96.88 % | Medium | N/A | Casinos List |
| 41. Wild Dragon | 96.85 % | Medium | N/A | Casinos List |
| 42. All Ways Win | 96.85 % | Medium | x5,000 | Casinos List |
| 43. All Ways Fruits | 96.85 % | Low | x500 | Casinos List |
| 44. Thrones of Persia | 96.85 % | High | x5,470 | Casinos List |
| 45. Party Time | 96.85 % | Medium | N/A | Casinos List |
| 46. Bells on Fire | 96.84 % | Medium-low | x1,000 | Casinos List |
| 47. Diamonds on Fire | 96.84 % | Medium-low | x1,000 | Casinos List |
| 48. Mechanical Clover | 96.8 % | Low | x760 | Casinos List |
| 49. Hermes Fortunes 2000 | 96.8 % | High | x25,000 | Casinos List |
| 50. Lucky Zodiac | 96.78 % | Medium | N/A | Casinos List |
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