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Infective Wild Slot Review

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Infective Wild is a Halloween-themed online slot that features expanding Wild symbols that make the same exciting and volatile. It was released by Pragmatic Play in 2023 and features 5 reels, 5 rows and 40 paylines with a 96.09% RTP. The main features include multipliers, expanding wilds, scatter, free spins, and more. You can win up to 5,000x your bet in this game, and it's available on both desktop and mobile.



Every holiday season brings with it a nice crop of themed online slots, and Halloween is no different. If you’re feeling the spooky spirit, Pragmatic Play just launched a fun little game called Infective Wild.

Set in a creepy forest inhabited by witches, black cats, bats, and pumpkins, Infective Wild focuses on powerful Wild symbols that can rapidly expand across the playing board. You could have guessed as much from the name, though. For now, we’ll just note that the game is all-in when it comes to its Halloween-inspired theatrics. It looks like a strange spin-off of The Nightmare Before Christmas, which we know a lot of people will find endearing.

Of course, this game has a lot to offer even if you’re not here for the spooks. Besides the theme, Infective Wild also has a lot of features that can make your time with it a lot more enjoyable. For example, you can buy features at any moment, which is a highly popular option in many modern slots. It also offers quick, exciting, and dynamic gameplay thanks to its infectious wilds and regular free spins.

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Infective Wild uses a fairly standard 5-reel layout. There are 40 active paylines spread across the 5×5 game board. To win, you have to match three or more identical symbols along one or more of these paylines, going from left to right. Fairly standard stuff for any slot machine, so beginners should have no trouble with this one.

You can set the size of your stake by using the plus and minus buttons in the lower right corner. Note that all bets in Infective Wild slots are calculated based on “coins.” You stake a single coin per payline, which means that $0.40 is the minimum stake. All payouts are based on multiplying the coin value instead of the total bet, which is something to keep in mind.

As far as special symbols are concerned, the Scatter symbols can pay anywhere on the table with no regard to paylines or positioning. It can only appear on reels 1, 3, and 5. Three Scatters can trigger the Free Spins round.

Expanding Wilds

As you may have guessed by now, wild symbols take centre stage in this game. Like always, they can be used to substitute for any other regular symbol. It only appears on reels 1, 2, 3, and 4. However, it’s also entirely possible to make a winning line made up of only Wild symbols. In this case, it has the same value as the highest-paying regular symbol in the game (the black cat.)

More interestingly, Wilds in Infective Wild are, well, infective. If one appears next to a Cat or Raven symbol, that symbol is instantly turned into another Wild. Only direct horizontal or vertical connections count, but there is no limit to how many symbols can be “turned” this way. In fact, if a Cat or Raven symbol turns into a Wild, any other Cats or Ravens its touching are also turned into wilds. Under the right circumstances, this feature can turn into a quick cascade of powerful symbols and massive payouts. Especially when you consider the fact that a single symbol can hit multiple lines.

Infective Wild Free Spins

The other big feature in Infective Wild is the Free Spins bonus round. As mentioned above, it’s triggered by hitting three Scatter symbols in one spin.

The first thing that happens in the bonus round is a sort of mini-game that determines how many free spins you’re awarded. You’ll be presented with eight single-reel mini-slot machines. Each of these contains three possible results – 1, 2, or 3. All eight reels will then spin simultaneously, and their results are added together into a sum total at the top of the screen. This total determines the number of free spins you get to enjoy. Basic math tells us that this means you can win anywhere between 8 and 27 spins.

During the Infective Wild bonus round, any Wild symbols that appear will stick to their position on the board until the end of the feature. Additionally, these stiky wilds are also Infective, meaning they can spread to nearby Cat and Raven symbols. With some luck, you could end up turning the whole board into Wilds.

We should also mention that you can use the Buy Feature to instantly trigger free spins at the cost of 100x the total current bet.

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Casino Bloke Best tips for Infective Wild Slot

  • 1Unlike most examples of Feature Buy slots, Infective Wild actually lowers the RTP if you purchase free spins. However, the difference is just 0.03%, so feel free to use the feature if you want to.
  • 2The Free Spin round in this game is highly volatile because of the high variance of awarded spins. Keep this in mind before buying them - you might end up either disappointed or highly rewarded.


Infective Wild uses the classic coin-per-line structure to calculate payouts. This can be hard to understand if you’ve never played a slot game before. Thankfully, though, the in-game paytable doesn’t use multipliers to showcase possible payouts. It simply tells you how much you stand to win based on your currently selected stake. This makes things a lot less abstract.

Anyway, the base game features 11 standard symbols of varying values. The card symbols such as Jacks or Queens are low-paying, which is a classic for slot machines at this point. The remaining symbols are various Halloween-themed props. Obviously, the Cat and Raven symbols are not only the most rewarding but also the most important symbols due to how they interact with the Infective wild symbols.

Infective Wild slot RTP sits at a comfortable 96.09%, which is quite solid. Opting to buy free spins will knock this down to around 96.06%, which is still more than acceptable.

what we like

  • Spooky-themed slot for the Halloween season
  • Powerful, expanding Wilds that are hugely impactful
  • Simple payout structure
  • Feature buy option

what we don’t like

  • High variance of awarded Free Spins
  • RTP decreases if you purchase Free Spins


While we wouldn’t call this game revolutionary, it has a few things going for it which make it one of the best slots to play this Halloween.

For starters, the spreading Wilds are not a mechanic we’ve seen before. Sure, expanding wilds exist in other games, but they’re rarely available all the time and are typically limited to bonus rounds and other volatile features. In this game, you’re likely to see Wilds spreading in almost every spin, which is quite fun.

Beyond that, it’s what we would call a “classic” release for Pragmatic Play slot game standards. Nothing too flashy, but simple and appealing enough to make this company’s games some of the most popular in the business. If you’re interested in similar titles, check out our list of the best Pragmatic Play slot games online.

Infective Wild Slot total score:

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Game developed by:

Release year:2023

Available on:Desktop, Mobile

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