big thunder

Big Thunder Slot Review

3/5 star-full-icon star-full-icon star-full-icon star-empty-icon star-empty-icon
Written By Kay Jones

Looking for a roaring time? Big Thunder slot may be the hidden gem your searching for! Ainsworth really held no punches giving players a stellar game experience with this slot. Surprisingly this is still one of their less popular games, we think this might be due to its rather simplistic interface. Still, it has some pretty awesome bonus round and free spin features that just might give you a taste for the jungle. If this peaked your interest, check out our Big Thunder slot review below where we’ll delve into all the slot details.

Trust badge
Recommended Bonus
slotsmillion casino
SlotsMillion Casino
star-full-icon star-full-icon star-full-icon star-full-icon star-full-icon
Welcome Bonus - RoW The Finest Slot Collection On The Market
Claim Bonus

Slot Information

rating-icon Rating
slots-rtp-icon RTP
slots-rtp-icon House Edge
software-icon Software Providers
Windows download, no download - instant play, mobile, Mac
auto-spins-icon Autospin Feature
max-bet-icon Min. Bet
created-at-icon Launch Date
slots-scatters-icon Scatters
max-bet-icon Max. Bet
max-coins-icon Max. Coins
slots-gamble-icon Gamble Feature
payline-icon No. of Paylines
grid-horizontal-icon No. of Reels
bonus-rounds-icon Bonus Rounds
free-spins-icon Free Spins
slots-wild-icon Wilds
slots-multipliers-icon Multipliers
slot-review-icon Slot Type
Progressive Slot
Big Thunder Slot Review screenshot Trust badge

Big Thunder Slot RTP, Details and Wager Limits

Big Thunder Slot is a medium volatility game with a 5x3 grid structure and a bet stake range of 0.01-100. The game offers an autoplay option in the form of auto games, which can be selected at rates of 10-100 auto games at a time. An interesting feature of this game is that it gives players the ability to adjust the number of pay lines they bet on in a range of 1-30. This means that players can increase or decrease the number of possible pay lines they will get paid out on, as opposed to more conventional slot games that only allow a fixed number of pay lines. While we really liked having this option, we kinda wish they went a step further to allow players to select the number of coins per line, or even the value of coins in the game. Another big plus, however, is the fact that Big Thunder Slot tracks your game history, allowing repeat players to keep track of their winnings as well as their losses. We think this is really great especially because it promotes playing responsibly which is something, we are strongly in favour of.

Big Thunder Slot RTP

Big Thunder Slot has a return to player of 94.38%. This essentially means that the game will reward players with 94.38% of what is staked on it globally. While this may not seem like a terrible rate, it is a little lower than the industry standard which is around 96%. This is the one feature of slot games were bigger is undoubtedly always better. But even if it isn’t the most generous game, in this case, the gap wasn’t nearly big enough to discourage us from playing.

Big Thunder Audio and Design Features

Big Thunder is a simple 2D slot with a crisp and clear interface but overall pretty standard visuals. While its far from the flashiest slot around, the jungle theme is rife in this game, and the sudden and abrupt sound effects keep in with this theme very well. Jungle drums, gorilla roars and cracking thunder will keep you on your toes as you delve deep into the jungle. Aztec masks, jungle drums, snakes and the big mighty gorilla that represents the games wild are among the mysterious symbols that may lead to your Amazonian treasure! 

We missed having arrow buttons to press when adjusting the bet value of our bets, as the scrolling function was a little sticky. But overall, we found the interface to be equally clear and responsive on desktop and mobile.

We can’t say that we were overly impressed with the overall design of the game, but it does have a certain character to it. Ainsworth kept it straightforward here and gave players with a flair for the rainforest a quality gaming experience that puts them right in the beating heart of the jungle.

Bonus Reel Features and Games in Big Thunder Slot

When it comes to Big Thunder slot machine, the proof is really in the pudding. And by pudding, we mean bonus features! Big Thunder has a great variety of bonus features including a free spin feature that is fairly easy to trigger. Big Thunder slot also offers players the chance to win from a quartet of Big Thunder progressive jackpots which can be mini, minor, maxi or major jackpot. While the wild gorilla only appears on reel 3, 4 and 5 only.

A Big Thunder logo, representing the scatter symbol, will payout in any position it lands on, and can give you back x2, x20 or x50 times your stake if you land 3, 4 or 5 of them anywhere on the reels. This will also trigger the bonus reel feature, awarding 15 free spins, but more on that in the next section. Even though the wild gorilla doesn’t pay out it does substitute for all symbols except the scatter, multiplier and king strike, making winning combinations that much easier to come by!

Big Thunder Slot Big Thunder Bonus Reel Features 

Landing 3 or more scatters symbols will trigger the Big Thunder slot glorious Bonus Reel Feature and the sweet 15 free spins that come with it. While the feature is active, a bonus reel will appear offering 2 new bonus symbols, ‘x3’ and ‘x5’, as well as the scatter. The wild gorilla will substitute for all symbols except for ‘x3’ and ‘x5’. As we’re sure you guessed, landing either of these symbols anywhere on the bonus reel will see your winnings for that game either TRIPLED or MULTIPLIED BY 5! We think that’s pretty sweet.

During every bonus reel round, an extra 5 bonus reel rounds are triggered whenever 3 or more scatters appear anywhere on the reels. While this feature is active the ‘feature paytable’ is applied, so be sure to check that out so you’ll know exactly what to expect. Incidentally, bet lines are paid at the same stake that triggered the Bonus Reel Feature.

Big Thunder Slot King Strike Bonus Round 

Big Thunder Slots offers players the chance of winning 4 exciting bonuses during their King Strike Bonus rounds. The Major Bonus is rewarded when a 5 of a kind Waterfall, Drum, Shield, Snake or Mask win line occurs with no substitutes appearing, and a King Strike symbol appears on reel 6. The Maxi Bonus is given out when a 5 of a kind Ace, King, Queen, Jack, Ten or Nine win occurs with no substitutes, while a King Strike symbol appears on reel 6. The Big Thunder slot Minor Bonus is triggered when a 5 of a kind Waterfall, Drum, Shield, Snake or Mask win occurs, with at least one substitute appearing in the winning pay line, as well as a King Strike symbol appearing on reel 6. The Mini Bonus is awarded to players when a 5 of a kind Ace, King, Queen, Jack, Ten or Nine winning pay line occurs, with at least one substitute appearing in the winning combination line, in addition to a King Strike symbol appearing on reel 6.  It’s also worth noting that bonuses cannot be triggered during the bonus reel feature. Overall, we’d say that even though they may be hard to come by, they are pretty favourable Bonus rounds.

Big Thunder Review Summary

We can say we had a pretty decent time trying our luck in the jungle on Big Thunder. The game is solidly designed and offers a straightforward user-friendly experience. While the audio and visuals aren’t the most immersive, we’ve seen, we think this is a quality game from Ainsworth, and we like how its executed. The ability to select the number of pay lines is always nice to have. So is having the option to track game history. But what really puts the game ahead is its bonus features. From bonus reels and free spins to major king strike bonus rounds, this game really makes the player feel like anything is possible, despite its medium volatility.

Where can I play Big thunder slot for free? chevron-down-icon
This slot is available in all the top casinos listed above in our Big Thunder review. Luckily these casinos offer the game in a demo version, which allows players to test the waters and see if they like the game before they try it out for real.
What is the Big Thunder slot RTP? chevron-down-icon
Big Thunder has an RTP of 94.38%. RTP is the return to player percentage which represents how much of what is staked on the game is paid out to players. This game’s RTP is a few points below the industry standard which is 96% at the time of writing.
Are there any Big Thunder Slot free spins? chevron-down-icon
Yes! Currently, you can get 15 free spins on Big Thunder every time you trigger the bonus reel feature. This happens when you get 3 or more scatters landing anywhere on the reels and can be won repeatedly. Scatter symbols are represented by the Big Thunder logo.