Boo Slot
Get 100 Free Spins when You Bet £20
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Type of Slot
Theme
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Stakes Range
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Free Spins
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Boo Demo
Recommended Casino
3,000+
Up to 24 hours-
United Kingdom (UKGC)
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Boo Slot RTP, Details & Wager Limits
You’ll instantly be drawn to the reels in the Boo slot game. It uses a 4×4 grid, which isn’t common in the industry. As a result, it’s one of the most unique online slots on the market. It uses every possible payline, meaning you have 256 ways to win. You need at least three matching symbols on a payline to create a win, with four on a line offering the biggest payouts.
You can wager between 10p and £10 in Boo, so it caters to low- and medium-budget players. It also provides autoplay and turbo spin options. However, they’re not available to UK online casino players. As a result, if you’re playing at UK slot sites, you can’t speed up the reels. It’s simple to navigate, with the stake selection and spin button on the right-hand side, which made the Boo demo easy for me to play.
The Boo RTP is set at 96.54%. It’s above the average for most slots, which is an instant positive for the game. The volatility is very high, so you’ll have to manage your bankroll to achieve the best wins. However, it wasn’t a shock to me when putting together my Boo review, as the top payout is in line with higher variance games.
The Boo max win is a mind-blowing 47,050x your stake. It instantly caught my eye as it’s typically only progressive slots that offer this kind of payout. The free spins round is where the biggest wins lie, particularly when lots of multipliers appear.
If you’re playing outside of the UK, you can buy the bonus. When buying 24 spins for 500x your stake, it increases the win potential to 200,000x. It’s a huge shame that this eye-popping max win is not available for UK spinners.
Theme: Turning Balloons into Ghosts
Big Time Gaming has practically reskinned its classic slot Pop with Boo. While it retains its position as one of the highest RTP slots, the theme has seen complete changes. The balloons are now ghosts, and they look great. Although the design is quite similar, it makes sense as ghosts are, by design, almost identical.
The colours on the screen are excellent. Despite having a spooky theme, the game uses plenty of bright symbols. They stand out on the dark background, which shows an ominous haunted house. You won’t be bored by the visuals when playing at Boo casinos, especially when you trigger the free spins round.
The sound design is great, featuring an upbeat tune with various spooky sounds mixed in. If you’re a fan of everything otherworldly and macabre, you will love all the visual and audio choices. Overall, Boo is an excellent example of BTG using an existing game but making it feel completely different with excellent design choices.
| Symbol | Payouts/Info |
|---|---|
 10 | 4 = 0.2x the stake |
 9 | 4 = 0.2x the stake |
 J | 4 = 0.3x the stake |
 Q | 4 = 0.3x the stake |
 A | 4 = 0.4x the stake |
 K | 4 = 0.4x the stake |
 Green Ghost | 3 or 4 = 0.1 or 0.8x the stake |
 Blue Ghost | 3 or 4 = 0.2 or 0.9x the stake |
 Red Ghost | 3 or 4 = 0.3 or 1x the stake |
 Purple Ghost | 3 or 4 = 0.4 or 2x the stake |
 Rainbow Ghost | Wild |
 Jack-O'-Lantern | Scatter |
Boo Mobile
There are very few differences between the Boo mobile slot and the desktop version. The controls are in the same positions, ensuring there’s no need to search for how to play. Graphically, it retains the same sharpness and the sounds are in line with the desktop edition. It’s an excellent conversion if you enjoy playing at a mobile casino.
Boo Bonus Features
There are three main Boo bonus features. The first two are available in the base game and the bonus rounds, and the third is the bonus round itself. While this title doesn’t have a wealth of features like some other slots, the bonus options are well-designed and fit the feel of the slot perfectly.
Cascading Reels (Reactions)
Whenever you create a win in Boo, cascading reels will trigger. These so-called Reactions remove all winning symbols from the reels and drop new symbols in their place. What sets this feature apart is that only ghosts, scatters, or wilds fall into cleared spaces. As a result, you have a better chance of bigger wins from a cascade.
Multipliers
Whenever wilds land and create a win in the base game, there’s a chance of them leaving an up-to-4x multiplier behind. The multipliers remain during cascades, but they vanish when you spin the reels again.
Free Spins
If you land at least 3 scatter symbols, you will trigger the bonus round. You get 12 free spins, and at least one of the scatter positions turns into a persistent multiplier. Whenever you land three or more scatters again, it increases at least one multiplier by 1, 2, or 3 and awards an extra 3 free spins. There’s no limit to how many extra spins you can claim during the round. As a result, it’s a potentially unlimited free spin round.
Any initial wins via wild symbols can add new multipliers, and ghost or wild wins increase some of the multipliers. All multiplier spaces remain persistent—not just the original ones. The original multiplier positions start at between 1x and 4x, but new multipliers all start at 1x. There’s no cap on how big the multipliers can get, which is why the biggest wins lie in the free spins feature.
Bonus Buy (Not Available in UK Online Casinos)
While reviewing Boo, I discovered a bonus buy feature with two options. If you pay 90x your stake, you get 12 free spins. If you decide to part ways with 500x your stake, you will get 24 free spins. An added extra for the 24-spin version is an improvement to the max payout, increasing to 200,000x. However, as it’s not available to UK players, I could only test it in the demo mode.
Boo Verdict: A Downgrade on Pop, But Still Lots of Fun
Boo is undoubtedly a great game to play. It has fun features and some excellent payouts, and it looks great. Although it’s not on par with Megaways slots, it still covers every possible way to win. Additionally, it doesn’t have a huge amount of symbols, making wins easier to come by.
Despite having a very high volatility, it doesn’t feel like it when playing. It could be that I had a favourable run, but wins came along quite often, and cascades often ran into two or three winning drops. While I really enjoyed playing Boo, it’s not as good as Pop. It’s well worth the 4.4/5 score, but the reduced maximum win stops it from claiming a full 5.
In any case, if you’re looking for free slots to play for fun, you can try the Boo free demo on this page and decide if it’s a good fit for you.
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Will is a seasoned writer with extensive experience in the iGaming industry. His expertise in slots and sports betting allows him to craft work that takes readers on an engaging journey through any topic. With a keen eye for detail, he provides intricate insights into slots, making him a leading voice in the iGaming sphere.
