Mega Ball explained

Mega Ball in one minute

Mega Ball borrows from bingo and the lottery. Before the draw you buy cards printed with numbers between 1 and 51. A live presenter then releases 20 balls from a drawing machine, the numbers are marked off your cards automatically, and any card that completes a line wins a multiple of its price. After the main draw, a Mega Ball is drawn with a random multiplier attached; if that number completes a line on one of your cards, the card’s payout is multiplied.

The game comes from Evolution, whose corporate site (opens in a new tab) lists it among its game shows. If you have played online bingo, the marking will feel familiar; the difference is that you play against a fixed paytable rather than other players, and there is no shared prize pot.

How a Mega Ball round works step by step

1. Choose a card value. It applies to every card you buy that round, and the minimum and maximum are set by the casino.
2. Buy cards using the 1, 10, 25 or 100 buttons. Each click adds that many cards, each printed with randomly chosen numbers.
3. When betting closes, 20 balls are drawn from 51. Your cards are marked automatically and lines in progress are highlighted.
4. A multiplier between 5x and 100x is generated on screen, then the Mega Ball number is drawn.
5. If the Mega Ball completes a line on any of your cards, that card’s win is multiplied. Some rounds have two Mega Balls; only the highest multiplier counts on any one card.
6. Wins are added to your balance and the next betting window opens.

You start every round yourself. Since 17 January 2025 UK rules require each game cycle on online casino products to be started individually, so there is no auto-buy that keeps purchasing cards for you.

Mega Ball odds: how often numbers and lines land

With 20 of 51 balls drawn, the chance that any one number appears is 20 ÷ 51, or 39.2%. Lines are much harder, because all five numbers on the line must be among the 20. The table shows the exact chance of matching a given number of the five numbers on one specific line.

Each card has several possible lines, so a card wins more often than 1 in 152; the help screen lists exactly which lines pay and how much. The key point is the near-miss. One of your lines will often be one number short, which feels close but is the most common way to lose. The Mega Ball helps only when it lands on that missing number: the chance that a specific line sits on four and the Mega Ball then fills it is about 0.21%, or roughly 1 in 485.

Mega Ball payouts and the 5x to 100x multiplier

Mega Ball pays according to how many lines a card completes. One line pays a small multiple of the card value and every additional line on the same card pays more, with the paytable shown in the game’s help screen. Because the paytable can differ between versions, we don’t quote fixed figures here.

As with other multiplier games, a big share of the return sits in rare outcomes. That makes Mega Ball high in volatility: long runs of small or no wins are normal.

How many Mega Ball cards should you buy?

More cards means more chances to complete a line, but you pay for every one, and each card carries the same built-in margin. Doubling your cards doubles both your spend and your expected loss. The return per pound stays the same.

The 5% edge in the table is a round number for illustration only. Check the RTP in the help screen at your casino and replace it; the shape of the maths is the same.

A practical way to set this up is to start from your budget. If you have £20 for an evening, 10 cards at 10p gives you 20 rounds; 100 cards at 10p gives you two. Our bankroll basics guide covers how to size stakes to a fixed budget.

Mega Ball RTP: where to find it

Evolution’s public game page doesn’t list an RTP figure, and casinos can run different configurations, so the reliable place to look is the information or help button inside the game at your casino. UK-licensed operators must make the rules and return information available to players. Our guide to reading casino game help screens shows where to find it.

Whatever the figure, it describes the very long run. RTP at, say, 95% means £95 back per £100 staked across millions of rounds, not £95 back from your own £100 tonight.

Live Mega Ball vs First Person Mega Ball

Evolution also offers First Person Mega Ball, a random-number-generator version without a presenter. It works the same way but runs on software rather than a physical ball machine, so rounds can be quicker. In the UK, non-slot RNG casino games must take at least 5 seconds per game cycle under rules in force since 17 January 2025, set out in the Commission’s Remote Technical Standards (opens in a new tab).

See our overview of First Person games for how RNG versions of live titles differ.

Mega Ball myths and number-picking systems

Because you can see your cards, it is tempting to believe some numbers are better. They aren’t. Each ball has the same chance of being drawn, and every card’s numbers are chosen at random, so no card is luckier than another. Common ideas that don’t hold up:

• Hot and cold numbers. Past draws don’t affect future ones; see the gambler’s fallacy.
• Buying 200 cards to cover the board. Coverage raises spend in proportion; the edge on each card remains.
• Waiting for a high multiplier round. The multiplier is generated after betting closes, so you can’t choose it.
• Staking up after a near-miss. A line that was one away last round has no better chance next round; betting systems explained covers why progressions fail.

Mega Ball and UK gambling rules

Although it looks like bingo, Mega Ball is offered as a casino game under a remote casino licence. The rules that apply to it in Great Britain include:

• Each round must be started by you, with no autoplay, since 17 January 2025.
• Your session time and net position must be visible on screen.
• The £5 and £2 per-spin slot stake limits do not apply, as Mega Ball isn’t a reel-based slot; the casino sets card value limits.
• Any bonus used on the game can’t require wagering above 10 times the bonus, following the 10x cap in force since 19 January 2026.
• A promotion can’t mix casino play with sports betting or bingo in a single offer, under the mixed-product ban.

To confirm a site is licensed, search its name or domain on the Gambling Commission register (opens in a new tab).

Mega Ball compared with bingo and keno

If you prefer picking your own numbers, online keno is the nearest match; for a social game with a shared prize, try 90-ball bingo.

Keeping Mega Ball affordable

Fix a budget, a card count and an end time before you start, and use the casino’s deposit limit and time-out tools. If you want a longer break from every UK-licensed site at once, GAMSTOP (opens in a new tab) offers free self-exclusion; our GAMSTOP guide explains how it works. The National Gambling Helpline is free and open 24 hours a day on 0808 8020 133.

Where to play Mega Ball online in the UK

Mega Ball is carried by many UK-licensed live casinos, though lobbies change. Check the game list at Casumo’s live casino or PlayOJO’s live casino before you deposit, and browse more titles from the games hub.

Our partner offers are not Mega Ball offers. Casumo gives new customers 18+ a 50% bonus up to £100 on a first deposit of £20 or more (opt in, 10x wagering within 7 days, £5 max bet, game and payment restrictions apply). PlayOJO’s 80 spins (18+, first deposit £10, 10p each, no wagering) are on Big Bass Bonanza, and Coral’s 100 spins (18+, bet £10 on slots, 10p each, valid 7 days) are for selected slots. Read the terms before choosing.

18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set deposit limits. Free, confidential help: National Gambling Helpline 0808 8020 133.