The gamble feature is an optional side game, offered after a win, that lets you risk the win for the chance to double it or more. The most common version asks you to guess the colour or suit of a face-down card; a wrong guess loses the whole win.
What the gamble feature is
The gamble feature dates from older video slots and fruit machines, where a similar "gamble" or "double up" option was a familiar part of the game. It is entirely optional. If you decline, the win is added to your balance as normal. Availability varies: some games include it, some do not, and the same game may be configured differently by different operators.
How it works, step by step
Card gamble:
- After a win, a gamble button appears.
- You press it and a face-down card is shown.
- Guess the colour (red or black) to double the win, or the suit to multiply it by four.
- A correct guess pays the higher amount and usually offers another gamble, up to a limit. A wrong guess loses the whole amount at stake.
- You can collect at any point between guesses.
Ladder gamble:
- The win is placed on a ladder of values.
- A light moves up and down; stopping it on a higher rung raises the win, a lower one loses it or drops it down.
- You can collect at any rung the game allows.
Common variations
- Half gamble: risk half the win and bank the other half.
- Gamble limits: a cap on the number of rounds or the maximum amount.
- Coin flip or wheel gambles: a different visual for the same idea.
- Feature gambles: risk a free spins award for more spins or a bigger multiplier.
What it does to the maths and the feel
A gamble cannot improve your expected return. If a colour guess is genuinely 50/50 and pays double, its expected value equals the amount you put in: the gamble is neutral. If it is weighted even slightly against you, it reduces your expected return. Either way, it never offsets the house edge of the slot itself.
What it always does is increase volatility. Turning a steady small win into an all-or-nothing guess widens the spread of outcomes, and repeated gambles make losing the whole win more and more likely. As an illustration: on a fair colour guess, the chance of winning three in a row is one in eight.
Rules in Great Britain
Where a gamble feature is offered on a GB-licensed site, the normal game design rules and stake limits apply to the game. Whether a particular game includes it varies, so check the game's info screen. If gambling is starting to feel like a way to win back losses, our safer gambling page lists free, confidential support, including the National Gambling Helpline on 0808 8020 133.
Questions people ask
Is the gamble feature a good idea?
It cannot give you an edge. At best a gamble leaves the expected value of your win unchanged; if it is weighted against you, it lowers it. It always makes results more variable.
Is the gamble feature available on GB-licensed sites?
Availability varies by game and by operator. Some games offer it and some do not, so check the game's info screen.
Can I gamble a free spins win?
Some games allow it and many do not. The rules for each game are set out in its help or info pages.