The Serial demo slot machine by Nolimit City has 4096 ways to win, a 5 x 3 reel expanding reel format, high variance & up to a 96.38 % RTP.


The inside of a dingy room provides the background graphics for this game. Blood graffiti can be seen on the walls while on the floor, and some police crime scene tools can be seen hence indicating that a murder has happened before. Things don’t get any nicer when it comes to the reels as the dominant symbols are all related to murders.




5 4 3 2
The killer 5.00 0.80 0.50
The detective 3.00 0.60 0.40
The wounded police officer 2.50 0.50 0.40
A female hostage 1.50 0.40 0.30
Human bones 1.00 0.40 0.30
A hook 0.90 0.30 0.20
Blood splatter 0.80 0.30 0.20
Bloodied gloves 0.70 0.20 0.10
Bloodied shovel 0.60 0.20 0.10
Bloodied hat 0.50 0.20 0.10


The featured reel symbols include the killer, the detective, the wounded police officer, a female hostage, human bones, a hook, blood splatter, bloodied gloves, bloodied shovel and a bloodied hat.


  • Wild: There are a couple of wild symbols that land on the reels. There is the xSplit wild and the xNudge wild. The former always carries a 2x multiplier value and it lands only on the last reel. When it lands, it can split symbols on the last reel in the process creating another symbol (of the same instance). The xSplit wild can also split special symbols such as the scatter hence doubling the number of bonus spins that the scatter symbols hold, the xNudge wild hence doubling the multiplier of the wild and the xWays symbols hence doubling the size of the xWays symbols. The xNudge wild lands on reels 2 to 4 and when it lands, it nudges until it becomes fully stacked. On each nudge, the xNudge multiplier is increased by one.

  • Scatter: The missing girl icon represents the scatter. When two of these symbols land on the same spin, they transform into the xWays symbol.

  • Enhancer Cells: Enhancer cells are the horizontal reels that appear directly above and beneath the standard reel grid. All the special symbols can land on enhancer cells. When the special symbols land, they award their conventional features. The enhancer cells at the start of the game are locked but they open up with each respin triggered.

  • Respin: All winning combinations landed trigger the respin. Upon activation, the winning symbols lock in their positions and other non-winning positions are respun. Players retrigger another respin if the previous respin improved the already existing winning combination. With each respin, the enhancer cells are opened up starting from left to right.

  • xWays and Infectious xWays: Players get xWays symbols when scatters transform into xWays symbols or when the symbols land in enhancer cells. Upon landing the symbols, they transform into the same regular symbol. xWays symbols may be infectious meaning upon landing on the reels, they infect all of the other same normal-sized symbols on the standard reel grid reel area to expand to the same size.

  • xBet: The xBet is an opt-in feature which allows players to increase their current bet by 20% for the chance to get a guaranteed scatter on the second reel.

  • The Search: Three scatters landing on the reels simultaneously help trigger The Search feature. The numbers shown on the triggering scatters are summed up and they constitute the number of free spins the player gets. Upon activating this feature, extra enhancer cells are opened up.

  • The Kill: Landing the xSplit symbol during The Search feature transforms the feature into The Kill bonus round. Alternatively, the feature is awarded by landing three scatters on the same spin with one xSplit symbol. The remaining free spins from The Search feature carry over into this bonus round and an extra two free spins are awarded. The triggering xSplit wild will remain persistent on reel 5 but will shift positions on each spin.

  • xBizarre: The max payout for the base game and bonus features is pegged at 18,700x the bet. Any spin that awards the max payout triggers the xBizarre feature. However, players ought to note that they may choose to play the xBizarre feature or opt-out. For those who opt-in, the feature comes with three rounds. Each successful round increases the win by a further 18,700x the bet. This, therefore, means if players are successful in all three rounds, they scoop a massive 74,800x the bet. Note that any unsuccessful level will not forfeit the entire payout but rather, forfeits only the payout for the failed level.

  • NoLimit Bonus: The yellow star icon on the main screen is the NoLimit bonus. When players click it, they get the chance to purchase any bonus feature they want.


  • The theoretical return to the player for this game is 96.07%.
  • The theoretical return to the player for xBet is 96.04%.
  • The theoretical return to the player for The Search feature buy is 96.27%.
  • The theoretical return to the player for The Kill feature buy is 96.38%.
  • The theoretical return to the player for Lucky Draw feature buy is 96.38%.




Serial is a great slot machine to play which comes with a somewhat unconventional dark theme like many Nolimit City games have.

Those who are comfortable with dark themes will enjoy the game as it offers some exciting and captivating bonus rounds.

History is awash with tales of ruthless serial killers. When playing the Serial slot machine, players are exposed to themes with these types of gruesome vibes.

Overall this is a must play, we can’t wait for more slot releases from Nolimit City as they are all pretty much one of the best studios about at the moment.

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