HippoPop Slot Review

The wilds of Africa are the setting for the HippoPop slot, a colourful game from Yggdrasil Gaming that’s uses Avatar UX’s PopWins game engine. Each time you land a winning combination, the successful symbols ‘pop’ and turn into 2 symbols and a new payout calculation follows. The ‘pops’ keep on coming as long as a new winner is formed. Extra ‘pops’ expand the reels to offer up to 65,536 ways to win as well as bringing multipliers into play. Fully expand a reel to trigger the free spins with multipliers from the base game carrying over and expanding throughout. Find out more about this unusual slot in our full HippoPop review.

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HippoPop Slot RTP, Details & Wager Limits

In the HippoPop start, each spin starts on a 5 reel, 3 row, 243 ways to win machine. You can increase the size of the reels and the ways to win by landing successive ‘pop’ wins. Those winning combination are formed by landing 3 or more matching symbols from left to right on adjoining reels, starting from reel 1.

Stakes range from between 20p and £40 per spin. Click on the bet button below the main spin button and choose from the assorted bet sizes. You will also find a Turbo and Autoplay function in certain countries (not the UK from October 2021).

The HippoPop RTP is 96.1%. With the variance being high, it comes with a 20.5% hit frequency rate. This means just over 1 in 5 spins will result in a winning combination. The maximum win from a single game round is an enormous 48,150 x your total stake.

Theme – Audio & Design Features – unusual Aztec/African mash up


Yggdrasil Gaming’s usual design flair is all over the HippoPop slot. The imagery takes inspiration from Mexican Alebrijes and Oaxacan folk art which is slightly bizarre given the game’s African setting. The colourful visuals work well here though. It’s not unfortunately inspired by the Hungry Hippos table top game.

The stylish imagery is complemented by a bouncy safari-style soundtrack. Compared to previous ‘Pop’ slots, it’s well designed and all very easy on the senses.

Set against a jungle backdrop, the reels are made up of A to J royals and a collection of crystal-like wild animal symbols. You’ll see fish, birds, frogs, zebras, big cats and flamingos. The most rewarding symbol is the gold hippo which pays 1, 2 or 4 x your total stake if you land 3, 4 or 5 on a payline.

You can play HippoPop on all devices including mobiles, tablets and computers. The PopWins mechanic has loads of moving parts but the design here is up to the task.

HippoPop Bonus Features

With 3 bonus features, the main attraction in HippoPop is the Free Spins feature. You can boost your winning chances here with expanding multipliers as well as enhanced payouts from the Hippo symbols when you’ve managed to expand all the reels.

PopWins feature

Land a winning combination and the successful symbols are ‘popped’ with 2 new symbols appearing in the vacated position. Called the PopWins feature, this also increases the size of the reel and boosts the number of ways to win. A new payout consideration then follows.

If a new winner is formed, a new ‘pop’ follows. Pops are repeated as long as new winners come along. The reels can reach 6 symbols high in the base game and 8 symbols high during the free spins. If there’s a winless ‘pop’ in the base game, the reels revert to their original 5 reel, 3 row setup.

Base Game Unlock Multiplier feature


The Base Game Unlock Multiplier feature comes into play when a reel in the base game reaches the full 6-symbol height. The multiplier rises by 1x until there are no more winning combinations.

Free Spins feature


Fully extending a reel doesn’t just bring multipliers into play. It also activates the Free Spins feature. You’ll be awarded a minimum of 5 free spins but there are opportunities to add to that by spinning a bonus wheel. On average, it will take 240 spins to trigger the free spins.

Anyway, the multiplier that was active at the end of the base game carries over to the free spins which start on a 5 reel, 3 row machine. Each ‘pop’ win that hits during the free spins increases that multiplier by 1x. The multiplier doesn’t reset following an unsuccessful free spin either.

The ‘pop’ wins can increase the size of the reels in the free spins, up to a maximum of 8 symbols high. If all reels are fully expanded, you’ll play with 65,536 ways to win. They don’t fully reset following a winless ‘pop’ either. Instead, they drop to the size of the shortest reel.

Fully unlock a reel so it reaches its maximum size and 2 extra free spins are added to your total. This means 10 more free spins can be won. Also, there’s an option to buy the Free Spins feature in some territories. This costs 85 x your total stake.

Furthermore, winning combinations made up of the most rewarding symbol hippo symbol receive a multiplier boost if you manage to extend all 5 reels to at least 6 symbols high.

  • 2x multiplier: all Hippo wins are doubled when all reels reach 6 symbols high
  • 3x multiplier: all Hippo wins are trebled when all reels reach 7 symbols high
  • 4x multiplier: all Hippo wins are quadrupled when all reels reach 8 symbols high

HippoPop Review Summary – these Hungry Hippos deliver plenty of action

The Mexican-influenced design for a game based on wild African animals is a bit strange but it actually works rather well. The HippoPop slot gameplay offers plenty of action courtesy of the PopWins mechanic.

The best opportunities arise in the free spins due to the increasing multiplier and higher value Hippo symbols. This is where the 48,150 x stake wins will come from. Saying that, HippoPop doesn’t offer anything we haven’t seen before in other ‘Pop’ slots. The best is PopRocks which offers 72,188 x stake payouts on each spin.

If you’re a fan of the classic safari theme but fancy trying something a little unusual, HippoPop could be just what you’re looking for. Like the PopWins mechanic? Cyberslot Megaclusters from Big Time Gaming has a similar concept where a symbol is replaced by more symbols when you get wins/reactions.

HippoPop FAQs

What is the HippoPop RTP?

The HippoPop RTP rate is 96.1%. Highly volatile, you’ll get a win every 5 spins on average as it has a hit frequency of 20.5%. The bigger wins will come in the free spins.

What is the HippoPop max win?

The most you can win from a single spin here is a massive 48,150 x your total stake. The key to winning big is from the increasing multiplier and up to 65,536 ways to win in the free spins.

What are PopWins?

Land a win and the PopWins feature is triggered. Successful symbols are ‘popped’ and replaced by 2 new symbols. Pops increase the size of the reels and the number of ways to win. ‘Pops’ continue as long as there’s a new winner created.

Is there a HippoPop free spins feature?

Yes, the Free Spins feature comes with an increasing multiplier which increases by 1 with each ‘pop’ win. There’s also up to 65,536 ways to win and increased Hippo payouts.

HippoPop Slot Information

  • Game:
  • Provider:
    Yggdrasil Gaming
  • Type:
    Video Slot
  • Reels:
  • Paylines:
  • Stakes Range:
    20p to £40
  • Bonus Features:
    Yes (3)
  • Free Spins/Multiplier:
  • RTP %:
  • Max Win:
    48,150 x
Review by Chris Taylor

Review by Chris Taylor

Chris is a slots expert that has reviewed and played over 4,000 online slots. Having being in the iGaming industry for over 16 years, he knows how slots work, how bonus features are triggered and how the RTP and variance affect the gameplay.

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