Starburst XXXtreme slot review

Starburst XXXtreme: a familiar face with new maths

The original Starburst is the archetypal gentle slot: low volatility, a 500x cap and frequent small wins. When NetEnt released Starburst XXXtreme in July 2021, it kept the space backdrop, the jewel symbols and the expanding wilds, then pushed the maths to the other extreme. The result looks almost identical at a glance and behaves completely differently.

That is a lesson worth taking from this game: a sequel’s artwork tells you nothing about its risk. You’ll find more examples in how slot sequels differ, and our direct comparison of Starburst vs Starburst XXXtreme goes line by line.

Layout, symbols and the 9 paylines

The grid is the familiar 5×3 with nine fixed lines. Coloured gems make up most of the paytable, with the lucky seven and the BAR symbol above them; NetEnt’s page lists the BAR as the top symbol, paying up to 150x the bet on its own. Wins need three or more matching symbols along a line. The game’s help screen shows the line patterns, which are worth a look because they differ from the original.

There is no scatter and no free spins round. Every feature runs through the wilds, which is why understanding them is the key to the whole game. Gem fans can find similar-looking games on our gem slots page.

Starburst Wilds: expanding, locking and respinning

Starburst Wilds can land on reels 2, 3 and 4. When one appears, it grows to fill the whole reel, as an expanding wild, locks in place and gives you a respin. If another Starburst Wild lands during that respin, it expands and locks too, and you get another respin. With three eligible reels, the chain can run to three respins at most.

In XXXtreme, each Starburst Wild also carries a random multiplier. That single change transforms the feature: a fully wild middle three reels was a solid result in the original, but here the multipliers on those wilds decide whether the respin sequence pays modestly or very well.

Random Wilds and multipliers from x2 to x150

After any spin or respin, Random Wilds can switch on and place one to three extra wilds on reels 2, 3 and 4. Each one comes with a multiplier of x2, x3, x5, x10, x25, x50, x100 or x150, according to NetEnt’s game page. When more than one multiplier is involved in a win, they combine, so the total can go well past x150. The help screen explains exactly how they combine in the version you are playing.

A simple worked example at 50p a spin: a line win worth 2x the stake (£1) that runs through a single x5 wild pays 10x, or £5. The same line through a x50 wild pays 100x, or £50. Most multipliers you see will sit at the low end of the scale; the x100 and x150 values are rare by design. The explainer on how multipliers work in slots shows why higher values appear less often.

Multiplier wilds are where nearly all of Starburst XXXtreme’s value is concentrated. Plain spins without wilds return little, which is exactly what high volatility feels like in practice.

How to play Starburst XXXtreme

1. Open the information screen and check the RTP and line patterns for your casino’s version.
2. Set your stake. UK rules cap it at £5 a spin if you are 25 or over and £2 if you are 18–24.
3. Spin. Each spin lasts at least 2.5 seconds, and you press the button every time because autoplay is banned in the UK.
4. When a Starburst Wild lands on reels 2–4, it expands, locks and awards a respin.
5. Watch for Random Wilds after a spin or respin, each carrying a multiplier.
6. Check your net position regularly; on a high-volatility slot your balance can fall quickly between features.

XXXtreme Spins and UK bonus-buy rules

NetEnt’s game page describes two paid spin modes: XXXtreme Spins at 10x the bet with one Starburst Wild on every spin, and a 95x version with two. Paying a multiple of the stake to change what lands is effectively a bonus buy, and feature buys are not offered to players in Great Britain. Expect UK versions of the game to leave these modes out; the game’s help screen will confirm what is available.

This matters when you read about the game elsewhere. Videos and reviews recorded outside Great Britain may show XXXtreme Spins in use, and any impression of how often big multipliers appear may be based on that paid mode. For the rule and its background, see how bonus buys work.

Starburst XXXtreme RTP and high volatility in pounds

A 96.26% RTP means a theoretical £3.74 is kept for every £100 staked over the long run. High volatility means the route to that average is bumpy: long runs of small or no wins, with occasional large hits from multiplier wilds.

On a game this volatile, those averages are almost meaningless for one session. Losing most or all of the amount staked is a common outcome, offset over time by rare large wins that most players won’t see. A budget you can afford to lose entirely is essential. Read our high volatility page for similar games and the slot bankroll management guide for planning.

The 200,000x max win: how realistic is it?

Starburst XXXtreme’s 200,000x max win is £20,000 on a 10p spin and £200,000 on a £1 spin. Reaching it would need several high multipliers lining up on wild reels at the same time, an outcome so rare that the vast majority of players will never see anything close. Casinos may also set a maximum payout per spin or per day in their terms, so check those before playing at higher stakes.

A cap this high is a statement about the tail of the game’s maths, not a likely result. The average return is still 96.26%, which means huge rare wins are balanced by many ordinary losing spins. Our page on slot max win explained goes into how caps relate to volatility.

UK rules that shape Starburst XXXtreme

Beyond the bonus-buy restriction, the UK version follows the standard design rules for online slots: no autoplay, no turbo or slam-stop, a 2.5-second minimum spin and no celebrations for returns below the stake. The £5 and £2 stake limits apply. Demo play is available at some casinos, but only after age verification. Each rule is set out in UK slot game design rules.

Starburst XXXtreme compared with similar NetEnt slots

Dead or Alive 2 is the closest match in risk: another nine-line NetEnt game where most of the value sits in rare, high-multiplier outcomes. Twin Spin offers retro styling with a much lower cap and steadier play. If you like the Starburst look but not the swings, the original remains the low-risk choice.

Pros, cons and who Starburst XXXtreme suits

Starburst XXXtreme suits players who enjoy high-variance games and understand that most sessions will end below the starting balance. If you liked the original for its gentle pace, this sequel probably isn’t for you.

Where to play Starburst XXXtreme in the UK

Search the lobby for Starburst XXXtreme before depositing, as availability varies between casinos. 10bet offers new UK customers a 100% match up to £25 on the first deposit if you choose the casino welcome bonus at sign-up and deposit within 7 days; the bonus must be wagered 10x on slots within 3 days and bonus winnings are capped at £1,000. Casumo gives 50% up to £100 on a £20+ first deposit with opt-in, 10x wagering within 7 days and a £5 maximum bet. 18+, T&Cs apply.

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.