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Big Thunder Slots Casino: Up to 500 Extra Spins on Starburst and Fluffy Favourites Slot (MegaReels Bonus Spins) Big Thunder Slots Casino is an online casino offering players a. Claim your 200,000,000 FREE COINS as starting balance now and play Thunder Jackpots Slots Casino’s free slot games - amazing Las Vegas slot games online! Hold & Spin the money balls to strike the.

Min bet size

0.01

Variance

Medium

Progressive Jackpot

Yes

Popularity

Max bet size

3000

Bonus Features

Yes

Theme

Adventure

The Big Thunder video slot title is a well-designed 3D slot from Ainsworth King Strike series. If you are looking for action-packed gameplay with flexible betting options, then this slot may be the answer as it rolls in free spins with multipliers as well as retriggers, stacked wilds, large scatter multipliers, and 4 jackpots that can be triggered at any time thanks to a 6th bonus reel.

Theme and Story Line

The Big Thunder slot title comes from the line of Ainsworth ‘King Strike’ series of slots. The theme is set in the dense jungles somewhere in South East Asia where tigers and gorillas roam amongst Buddhist and Hindi relics in a bid to bring good luck and fortune to the reels.

Graphics, Sounds and Animations

Ainsworth’s slot developers have done an amazing job on this slot’s design. The graphic design work is centred on the jungle backdrop, and symbols of ancient relics and wildlife, which are all in 3D with a crisp finish so they appear clearly on mobile and desktop devices. Regardless of the device, you play this slot on, you will be able to have a shot at the progressive jackpot on a quality designed slot.

The sound effects are also different compared to most Ainsworth games. Usually, this slot developer goes for classic slot sounds and lets the gameplay do all the talking. However, on the Big Thunder online slot game you are treated to tigers and gorillas roaring, the sound of thunder as an animated thunderbolt hits the reels in anticipation of triggering the bonus scatter.

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Gameplay

When you initially open the slot, there is a lot to take in as there is so much going on. At the top of the 5-reels, you have the Major, Maxi, Minor, and Mini progressive jackpots. On the right-hand side, there is the ‘Bonus Bet’ option, which is effectively the 6th reel and it costs you nothing extra to play this reel.

To take a shot at the jackpot you will need to set you your bet per line and line bets. You can do this via the menu or slot interface. You bet per line is multiplied by the number of lines you wager to tot up your total bet per spin. After getting your spin bet amount ready you can spin manually or set auto spins.

Reel 3, 4, and 5 are home to the rare gorilla species, which is the wild card symbol. The Gorilla symbol can act as any of the other regular symbols helping you to complete and extend combination payouts. Some wild Gorilla symbols are stacked in sets of 3 and some are lone symbols.

Regular symbols that can link up with the wild include the ancient religious mask, snake, shield, waterfalls, drums, Ace, King, Queen, Jack, 10, and 9 symbols. The wild symbol is also the highest paying combination paying 2,000x, 300x, 100x, or 5x multipliers applied to your bet per line when 5, 4, 3 or hit an active pay line. All other regular symbols pay for combinations with 5, 4, or 3 symbols.

There is also a scatter symbol that pays out multipliers of your total spin bet, and this triggers the free spins game, which is where most of your big wins will come from. And obviously, you will be vying for the bonus reel ‘Kings Crown’ symbol to line up with the pictured regular symbols to release the progressive jackpot win.

Bonuses and Free Spins

Winning one of the jackpots requires particular combinations to come in on a pay line. In all cases, you will need to have landed the ‘crown’ symbol on the ‘Bonus Bet’ reel to activate a jackpot payout.

Major: a 5-symbol combination of either waterfall, drum, shield, snake, or mask Crown on bonus reel.

Maxi: a 5-symbol combination of either A, K, Q, J, 10, or 9 symbols Crown on bonus reel.

Minor: 5 waterfalls, drums, shields, snakes, or masks with the wild symbol Crown on bonus reel.

Mini: A, K, Q, J, 10, or 9 with the wild symbol Crown on bonus reel.

Aside from vying for the possibility of landing one of the jackpots, there is also the free spins game that is triggered by landing the ‘Big Thunder’ logo scatter symbol across the reels in any position. You will firstly be paid out a spin bet multiplier depending on how many scatter symbols landed on the reels. This will be 100x, 50x, 20x, or 2x for 5, 4, or 3 scatters respectively.

Next up you have 15 free spins on custom free spins reels with an added bonus reel that contain x3 and x5 multiplier symbols. Any wins on the reels will be multiplied by the multiplier symbol on the bonus reel. The Gorilla will still be a substitute symbol and scatters can still pay spin bet multiplier plus retrigger 5 free spins.

Bet sizes, RTP and Variance

You can pretty much set your bet to almost anything you please on the Big Thunder slot title. The highest bet settings will be 30 lines at 100.00 per line, which gives you a max bet of 3,000.00 per spin. The lowest bet is 1 line at 0.01 per spin making this ideal for penny slot players. Your expected RTP on your bets is 94.38% and this is a medium variance slot game.

Conclusion

If you like free spins games with multipliers while always being in with the chance of landing a killer jackpot payout, then Big Thunder will suit you down to the ground. Most people will easily get on with the theme and the graphics as well as some of the animations. Everything seems to just work well together giving this slot great features, exciting gameplay, and overall it just has a nice vibe to it.

Big Thunder slot review

You might assume that a slot called Big Thunder would be about the Norse God 'Thor' or something equally thunderous. However, this is not the case with Ainsworth's online video slot Big Thunder, which is set in the jungle with a mighty Gorilla taking centre stage. Land-based slots players may have already played Big Thunder in casinos. This one is almost the same, with a few adjustments in this 'King Strike' adaption. There are 30 paylines over 5 reels and 3 rows plus a single-symbol reel on the left of the middle row. The other symbols are waterfall, drum and snake and there are the usual card symbols for lower pays.

Jungle jaunts

The game doesn't have a musical soundtrack like many but simple noises for spinning and any wins. The Gorilla is the Wild and appears only on reels 3, 4 and 5 stacked, but is very frequent! The highest-paying 5-of-a-kind is the scatter offering 50x stake whereas for symbols it's only 5x stake, for which there is a reason we shall see in the bonus.

Jungle jackpots

There are 4 built-in jackpots you can win by landing certain 5-of-a-kind wins on the screen when a Crown also appears on the 6th. single-symbol reel. So 5 of the lower card symbols on a win-line combined in any mix with the Crown will pay the Mini Jackpot, the same but with higher card symbols the Minor, with lower premium symbols the Major and higher premium symbols the Mega. These are fixed amount that are increased with your own play.

Thundering bonus

Three or more Big Thunder scatters anywhere triggers 15 free spins. These are unique in design and work very differently to what you may be familiar with! Firstly the card symbols disappear and the Wild Gorillas now appear singly on all reels and even substitute for the scatter. The mini-reel on the left then has scatters added as well as 3x and 5x multipliers, so if you don't hit a blank space you'll get one of those three. All wins now pay as scatter wins, but only if they fall on one of the 30 paylines, bar the scatters themselves. Confused? It's actually quite simple - you win if any 3 similar symbols/Wilds fall on any payline in any position. You don't get retriggers for the whole 15 spins, but any 3+ combination of scatters/Wilds anywhere will add 8 extra spins. You can now hit 200x stake for 6 scatters if you land the scatter on the end single reel! You could also hit 5 scatters on the reels with a 5x multiplier on the small reel for 500x stake as scatter awards are double in the bonus. The game is very much centred on the free spins.

Our View...

Big Thunder is a great addition to the Ainsworth range of online slots. It has a lot to live up to when compared with other slots from this developer such as the very-playable Eagle Bucks or the highly-rated Grand Dragon, but holds its own with ease. A reasonable 94.38% RTP and the free spins aren't too hard to trigger which is fortunate given their apparently significant contribution to the slot's overall returns. The potential for big hits is there too and the sounds are quite tolerable for the long session, not forgetting you have jackpots to play for as well! Maybe it's time for my rumble in the jungle...

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