There are slot games that simply draw us in with their colorful and joyous vibes, and then there are slots like Serial, which leaves no stone unturned to showcase the dark side of the human psyche. Highly inspired by popular psycho-crime thrillers, Serial slot game is a gruesome feast that intensifies the setting with its art style and visuals and a wide array of in-game features. A highly volatile slot, the game boasts an incredible payout potential of 18,700x the stake during the base game and free spins, but the gamble modifier tagged along can take you straight to an earth-shattering 74,800x the stake!
Provider:
Nolimit CityAdvertising Disclosure
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Slot Description
Initially, the game starts on a standard 5x3 grid layout with a few locked positions at the top and bottom. With 243 ways to win to kick things off, the number of winning ways increases depending on the number of unlocked positions on the reels.
Activating the xBet option increases the bet price by 20% and, in return, guarantees a scatter symbol on the second reel. As for wins, hitting 3 or more identical symbols on adjacent reels qualifies you for payouts. Note that only the highest win per bet-way gets paid.
Apart from the standard payout rules, several features like Respins, xSplit, xWays, etc, help you trigger a win. We will look at them in more detail during the features section.
Symbol Payouts
The serial killer's accessories constitute the low-paying symbols. As for the high-pay symbols, we come across bones and a few character symbols, with Bodycam Butcher being the highest-paying one.
There are proprietary Nolimit symbols, such as xSplit, xNudge Wild, and xWays symbols, which enhance the gameplay in their respective way. The slot also has a regular wild symbol, which substitutes for other pay symbols. And then there's a scatter symbol which helps activate the bonus feature.
Bonus Features
The Serial slot is packed with a bundle of features that don't let the gameplay get boring even after a more extended session. With special features like the Search and the Kill, you can land incredible payouts that can help you generate impressive wins.
Respins
When winning symbols land, they stick to the reels while other symbols respin. Respins continue if the previous win improves or a new one lands. Meanwhile, with each respin, two enhancer cells - at the top or bottom - are unlocked from the leftmost position, one reel at a time.
Enhancer Cells
Enhancer Cells, when unlocked, can land a few special modifiers, which are as follows:
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xWays: the xWays symbol reveals 2 to 4 symbols of the same type. If multiple xWays symbols land in the same spin, they reveal the same symbol.
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Infectious xWays: affects all the regular symbols to expand them to the same size
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xNudge Wild: upon landing, the xNudge Wild nudges to full view. With each nudge, the multiplier increases by +1.
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Regular wild symbol
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High-paying character symbols
xSplit Wild
xSplit Wild is a 2x wild symbol appearing only on the 5th (rightmost) reel. Whenever the xSplit symbol lands, it splits all the symbols on the same row into two, including the scatter, xNudge wild, and xWays symbols. This implies that scatters holding bonus spins number also doubles. Similarly, the xSplit symbol doubles the multiplier of xNudge wild and doubles the size of xWays symbol.
The Search
Hitting 3 scatter symbols in the same spin triggers The Search bonus feature. The number of free spins is determined by the sum of values displayed on each triggering scatter. The feature starts with extra Enhancer Cells unlocked on reels 2, 3, and 4, thereby increasing the reel formation to 3-5-5-5-3 and giving players a better shot at winning. If an xSplit symbol lands during the feature, the bonus round upgrades to The Kill feature.
The Kill
The activation of The Kill feature is possible in two ways: firstly, during the base game, achieved by landing 3 scatters and an xSplit symbol in a single spin, and secondly, through The Search feature, triggered by simply landing an xSplit symbol. Once activated, the feature works pretty much like The Search feature but with the added leverage of always keeping the xSplit symbol on the 5th reel, albeit with positional shifting.
xBizzare
In both the base game and bonus round of Serial, the maximum achievable win is limited to 18,700x the stake. Once this threshold is reached, players can claim the maximum payout of 74,800x the stake by engaging in the xBizarre feature. This three-tiered game segment presents a 50:50 chance of making the correct guess. Successfully guessing all three answers awards the slot's top prize. The good thing about the feature is that making incorrect guesses does not result in losing your previous winnings.
Nolimit Bonus
Nolimit Bonus gives instant access to the bonus features by paying the requisite cost. The Search comes with a buying cost of 78x the stake, whereas The Kill feature activation costs 480x the stake. A third option, the Lucky Draw, is priced at 279x the stake. This option gives you a 50:50 chance of triggering either The Search or The Kill feature. Note that the Nolimit buy bonus feature might not be available in some jurisdictions.
Payout Statistics
When offering max win potential, Nolimit City slots are second to none. These games are widely known for their massive win potential, and the same stands true for Serial as well. Even though the slot offers 18,700x the stake in the base game and during bonus spins, which again is quite an impressive prize on its own, the slot's max paying capacity is a whopping 74,800x the stake.
However, these max win stats look more pronounced on the paper. As Nolimit City mentioned, the chance of winning the max payout is 1 in 12 million. But that doesn't mean the slot doesn't pay out well. On the contrary, one of our buy bonus sessions fetched 3,586x the stake, much nearer to the max win potential of many online slots.
Considering Serial's hit frequency of 27.59% is equally relevant, theoretically ensuring a win within every four spins: a good enough statistic for a highly volatile slot. Furthermore, Serial RTP of 96.07% is more than decent provided the industry average is 96% for online slots.
Table of content:
What we like
What we don't like
Final Verdict
With Serial, Nolimit City has proved once again that there's no shortage of creativity in their office. Every aspect of the slot is promising, whether you look at its gruesome theme or the monstrous bunch of features. The most commanding of all in the game is the Respin feature, which enhances your winning potential and paves the way for Enhancer Cells, where xWays, xNudge, and other modifiers are more likely to appear.
Then there's the famous xSplit symbol, which can quickly turn the fate of a hopeless spin. But not everything is green in this blood-bathed game. The extreme volatility levels can nick away your last credits without showing anything worthwhile. You might also opt for the buy bonuses, but stay cautious of the The Kill feature, for it costs a fortune and is way too riskier. On the contrary, the Search can prove to be a more prudent alternative.
The best part about Serial is that you can work your way around it through myriad ways. And even though the theme might or might not resonate with you, the impressive mechanics are more than enough to hold a player's attention.

Review By Royal
Review By Royal
Cosmin: crypto gambling guru with a twist. Half a decade in the biz, he's worn both the casino suit and player's lucky socks. This high-roller has dropped $30K on live streams and test-driven 70+ crypto casinos. Now, he's spilling the beans in plain English, serving up the juiciest industry intel on this site. When he's not crunching numbers, you'll find him jet-setting to gambling conferences, dropping knowledge bombs from Dubai to Barcelona. Think of him as your personal crypto casino compass, but with better jokes.
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