The Mega Joker slot is NetEnt’s classic fruit machine: 3×3 reels, five paylines and a second set of Supermeter reels above, where the RTP can reach 99% at the top stake. That number comes with conditions, and it only applies to one way of playing. This review explains both modes, the random jackpot and how UK stake limits fit in.
The up-to-99% RTP applies only to Supermeter play at the highest stake; the basic game returns less.
Basic-game wins can be carried onto the Supermeter reels, which use larger fixed stakes and a different paytable.
Volatility is high and a random progressive jackpot sits on top.
UK stake limits of £5 (25+) and £2 (18–24) can stop you reaching the top Supermeter level at higher coin values.
Developer
NetEnt
RTP
Up to 99% (top stake with Supermeter)
Volatility
High
Layout
3 × 3, plus Supermeter reels
Ways to win
5 paylines
Max win
Random progressive jackpot
Mega Joker: a pub fruit machine rebuilt online
Mega Joker looks like a cabinet from an amusement arcade, with a jester, cherries, lemons, bells and lucky sevens. It is one of NetEnt’s oldest-feeling games, and that is the point. There are no free spins, no cascading reels and no bonus round. What it has instead is a two-tier design borrowed from real fruit machines, where wins can be carried up to a second set of reels and played at bigger stakes.
If you grew up with machines in pubs and seaside arcades, the rhythm will be familiar. If not, the Supermeter takes a few minutes to understand. Our guide to fruit machine features covers the wider family of ideas Mega Joker borrows from, and classic slots lists other games in the same style.
Basic game and Supermeter: the two ways to play
The screen is split. The lower reels are the basic game: three reels, three rows and five paylines, where you choose a stake in coins. The upper reels are the Supermeter, which you play using money that has been moved onto the meter rather than straight from your balance.
Basic game
Supermeter
Where it is played
Lower reels
Upper reels
What funds the spins
Your cash balance
Winnings carried onto the meter
Stakes
Choose from a range of coin bets
A small set of fixed, larger stake levels (NetEnt lists four)
Paytable
Standard fruit symbol wins
Higher payouts, extra symbols such as lucky sevens
Return to player
Lower than the headline figure
Up to 99% at the top stake level
Leaving the mode
Collect to balance at any time
Collect the meter back to your balance at any time
Winnings from the basic game can be carried onto the Supermeter. You then play the upper reels with that money at one of the fixed stake levels until you choose to collect or the meter runs down. Anything left on the meter can be collected to your balance whenever the reels are still.
Mega Joker RTP: why “up to 99%” has conditions
Mega Joker is often listed among the highest RTP slots, and at its best it deserves that. But the 99% applies to a specific way of playing: Supermeter mode at the highest stake level. Play the basic game only, or use a lower Supermeter stake, and the return is meaningfully lower. The game’s help screen gives the breakdown for the version your casino runs.
This is a good example of an RTP range driven by player choices rather than by casino settings. The headline is real, but it is a ceiling. Here is what the top figure would mean if you played at it consistently:
Amount staked
Expected return
Expected cost
£50
£49.50
£0.50
£100
£99
£1
£250
£247.50
£2.50
£500
£495
£5
Those costs look tiny, but high volatility means short sessions swing far more than the averages suggest. Losing a whole budget on Mega Joker is entirely possible even when every spin is on the best-returning setting.
How to play Mega Joker step by step
Open the game’s help screen and note the RTP figures for each mode and the Supermeter stake levels.
Set your coin value and your basic-game bet in coins. UK limits mean the total can’t exceed £5 a spin (25+) or £2 (18–24).
Spin the lower reels. There is no autoplay in the UK, and each spin lasts at least 2.5 seconds.
When you win, choose whether to collect it to your balance or carry it onto the Supermeter.
On the Supermeter, pick one of the fixed stake levels and play the upper reels from the meter balance.
Collect the meter to your balance whenever you want to stop, then check your net position.
A worked example of a Supermeter run
For illustration only, imagine a 10p coin value. You win 200 coins (£20) in the basic game and carry it onto the meter. At a Supermeter level of 20 coins, each upper-reel spin costs £2, so £20 funds 10 spins before any wins. At 40 coins (£4), it funds five.
Now apply the UK limits. A player aged 25 or over can use the £4 level, because it is under £5. A player aged 18–24 cannot, because it is over £2, so the higher-returning levels may be out of reach at that coin value. Dropping the coin value lowers every stake, but the Supermeter levels are fixed in coins, so the trade-off between stake and return stays. The point is not to push stakes up to chase the 99% figure; it is to understand that the advertised RTP may not be available at the stakes you are comfortable with. Our guide on UK slot stake limits explains the age bands.
Symbols, the jester and the Supermeter paytable
The symbols are fruit-machine staples: cherries, lemons, watermelons, bells, a treasure chest, jesters and, on the Supermeter only, lucky sevens. The same symbol usually pays more on the upper reels, which is how the Supermeter achieves its higher return. Some Supermeter combinations pay a mystery amount rather than a fixed prize; the help screen lists which ones.
With only five lines and three reels, combinations are easy to read. Reading the paytable in both modes before playing will tell you more about this game than any amount of watching the reels.
The Mega Joker progressive jackpot
A progressive jackpot is shown above the reels and can be awarded at random rather than through a symbol combination. NetEnt’s page links it to the basic game and Supermeter switch without giving the odds, so we don’t quote any. As with all jackpots, the chance on any single spin is very small, and the jackpot shouldn’t be a reason to raise stakes.
Mega Joker’s top prize is therefore a random progressive jackpot rather than a fixed multiplier of your stake. Regular wins are capped by the paytable, so the jackpot is the only route to a very large prize.
High volatility on a three-reel slot
Simple-looking games are often assumed to be gentle. Mega Joker isn’t. Its high volatility comes from the Supermeter: larger stakes on the upper reels mean the meter can empty quickly, while better runs pay well above the basic-game rate. Expect stretches with little coming back, punctuated by bigger Supermeter wins.
If you want the classic look with less swing, Fire Joker is rated medium. The high-volatility slot strategy guide covers budgeting for games like this.
Mega Joker compared with other classic and high-RTP slots
Fire Joker shares the jester and three-reel grid but adds a respin and a multiplier wheel. Sizzling Hot Deluxe keeps the fruit theme on five reels. Blood Suckers is the pick if a high RTP matters more than the fruit-machine feel, since its 98% doesn’t depend on a stake level. NetEnt’s Jackpot 6000 is the closest relative, with its own Supermeter mode.
UK rules and Mega Joker
Every UK rule for online slots applies: no autoplay, no turbo or slam-stop, at least 2.5 seconds per spin and no win celebrations for returns below your stake. The £5 and £2 per-spin limits apply in both modes, including Supermeter stakes. There is no bonus to buy. A demo can be played only after age verification. For the whole picture, see our UK slot game design rules guide.
Pros, cons and who Mega Joker suits
Advantages
One of the highest RTP ceilings of any online slot
Genuine fruit-machine feel with a two-tier Supermeter
Simple, readable five-line paytable
Random progressive jackpot on top
Drawbacks
99% only applies at the top Supermeter stake
High volatility can drain a meter quickly
UK stake limits may block the best-returning level
No free spins or modern features
Mega Joker suits patient players who like classic fruit machines and want to understand exactly how a game’s return is built. It is less suited to small budgets or anyone who prefers frequent, steady wins.
Where to play Mega Joker in the UK
Check the casino lobby for Mega Joker before signing up, as not every site carries it, and confirm the RTP in the help screen. PlayOJO gives new UK customers (not Northern Ireland) 80 free spins at 10p each on Big Bass Bonanza with a first deposit of £10 or more; there is no wagering and winnings are paid as cash. Casumo’s welcome is a 50% bonus up to £100 on a £20+ first deposit, which you opt into and wager 10x within 7 days, with a £5 maximum bet and game restrictions. 18+, T&Cs apply.
Significant terms: 18+. New UK customers (excluding Northern Ireland). First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. GamCare.org.uk
Read the PlayOJO reviewLicence: Skill On Net Limited, UKGC account 39326. Offer checked 5 October 2026.
Significant terms: 18+. New customers only. Opt-in required. 50% deposit bonus up to £100 on first deposit. Minimum deposit £20. 10x wagering on the bonus amount. Maximum bet or spin £5. Bonus valid for 7 days. Game, play and payment method restrictions apply. Full T&Cs apply. GamCare.org.uk
Read the Casumo reviewLicence: Recro Limited, UKGC account 61549. Offer checked 5 October 2026.
18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set limits. Free, confidential help: National Gambling Helpline 0808 8020 133.
Frequently asked questions
What is the RTP of Mega Joker?
Mega Joker’s RTP can reach 99%, but only when you play the Supermeter at its highest stake level. The basic game on its own returns noticeably less, and lower Supermeter stakes sit in between. The help screen at your casino shows the figures for the version you are playing. That makes the 99% a ceiling, not an average for every player. The explainer on how slot RTP is calculated shows why a game can have several return figures.
How does the Mega Joker Supermeter work?
The Supermeter is a second set of reels above the main game. When you win in the basic game, you can carry the winnings onto the meter instead of collecting them. You then spin the upper reels at one of a few fixed, larger stake levels, using the meter balance, with a richer paytable that includes lucky sevens. You can collect the meter back to your cash balance whenever the reels stop. Our fruit machine features guide shows where the idea comes from.
Is Mega Joker the highest RTP slot in the UK?
It is one of the highest when played on its best setting, at up to 99% with the top Supermeter stake. But that figure depends on how you play, whereas a slot like Blood Suckers lists 98% without any stake condition. Casinos can also run different RTP versions of the same game, so check the help screen. Our answer to what is the highest RTP slot in the UK compares the main contenders and explains the caveats.
Can players aged 18 to 24 use the Mega Joker Supermeter?
Yes, but the £2 per spin limit for players aged 18–24 applies to Supermeter stakes as well. Because Supermeter levels are fixed in coins, the higher levels may exceed £2 at larger coin values, which means the best-returning setting may not be available at that coin size. Players aged 25 and over have a £5 limit. The limits exist to slow spending, so treat them as a guide to sensible stakes. Read more in why there is a £2 slot limit.
Does Mega Joker have free spins?
No. Mega Joker has no free spins round, no scatter symbol and no bonus game. Its extra layer is the Supermeter, where winnings from the basic game can be played at higher stakes on a richer paytable, plus a random progressive jackpot. If you want a classic look with a feature round, other games in our 3-reel slots category add respins or multipliers. Any free spins you get from a casino promotion are a separate offer with their own terms.
How do you win the Mega Joker jackpot?
The Mega Joker progressive jackpot is awarded at random rather than by landing a particular symbol line. NetEnt doesn’t publish the odds on its game page, and we don’t estimate them. The jackpot is shown above the reels and grows as people play. On any single spin, the chance of winning it is very small, so it shouldn’t influence how much you stake. Our explainer on are jackpot slots worth it looks at the trade-offs of chasing a progressive prize.
Is Mega Joker high volatility?
Yes, Mega Joker is rated high volatility. The Supermeter is the main reason: its larger stakes can use up a meter quickly, while a good run pays well above the basic-game rate. That produces long quiet spells and occasional bigger wins, despite the simple three-reel layout. Plan for that swing with a budget you are comfortable losing in full. The volatility guide explains how to read a game’s risk rating and what it means in pounds.
Can I play Mega Joker in demo mode in the UK?
Many UK casinos offer a Mega Joker demo, but you have to pass age verification first, as required for all free-to-play games on UK-licensed sites since 2019. A demo is a sensible way to learn the Supermeter before risking money, because the two-mode layout confuses many first-time players. Demo play uses virtual credits and doesn’t predict real results. Our guide on how to test a slot in demo mode suggests what to look for.
Is Mega Joker like a pub fruit machine?
In style, yes. The fruit symbols, the jester and the two-tier Supermeter all echo machines found in UK pubs and arcades, where winnings can be pushed up to a higher-stake feature. The rules are different, though: online slots in Great Britain have their own stake limits, a minimum spin time and no autoplay. Our comparison of online slots vs pub fruit machines explains how the two differ in pace, stakes and regulation.
Gambling can be addictive. Free, confidential help is available 24 hours a day from the National Gambling Helpline on 0808 8020 133. Get support from GamCare or NHS gambling support, or block yourself from all UK-licensed gambling sites with GAMSTOP.
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