Nothing beats a good old-fashioned whodunit – not even the adrenaline rush induced by the unpredictability of the slots and suspense of knowing that each spin can be the one to trigger the max payout of the game. If you are one of those players who are always looking for an extra edge and you feel that traditional slots are simply not challenging enough for you, look no further! Gone are the days when launching a conventional slot machine with a spin n’ win system was pretty much all one was expecting from the software developer.

Keeping the players interested is not as easy as it was before the market was saturated and the providers are nowadays pushed into finding new ways to get their games across and leave the competition behind – and what is more challenging and thrilling than solving a crime while pursuing a jackpot? If your little gray cells are already tinkling with excitement, just imagine how you will feel when you take out your magnifying glass in search for clues…

Crime Scene by NetEnt

There is something fascinating about investigating a crime scene and NetEnt will definitely bring out your inner forensic expert with their 5-reel and 15-payline slot inspired by prime time cop TV shows. There are 10 betting levels and the player can wager as low as $0.15 on a single spin or maximize the levels and coin value to $150 per spin. The players can also get a glimpse of the slot bonus feature and see how inspecting the crime scene and finding the evidence will affect the total payout and multiply one’s bet. 

The symbol that activates the bonus round is the Fingerprint icon, which, in a combination of 3, triggers the in-game played over a forensic lab background. The player’s task here is to click on the folders and thus reveal cash prizes or more evidence. Running into a red X symbol can potentially end the game and the player is presented with four envelopes, each hiding a prize or a chance of returning to the bonus game. Throughout the game, the player can also hit the green V icon which awards an extra life and prolongs the bonus when a new red X is revealed. 

The Sticky Wild Police Badge is another icon that triggers a bonus feature and if you manage to land 3 of those, they will stick onto the reels, unlocking 5 Free Spins and replacing all other icons except for the Bonus symbols.  

CSI Crime Scene by IGT

Based on the iconic TV crime and mystery drama, CSI is a 20-payline and 5 reel slot version of the show, featuring popular characters as the main symbols and opening the session with the recognizable music intro. Your forensic tasks are triggered by 3+ Crime Scene icon combination, formed on the reels in adjacent positions which will prompt the player to start gathering the evidence. At least four successfully collected pieces of evidence (Fiber, Blood Spatter, Bullet or a Shoe Print) will unlock a cash award which will depend on the number of active lines and the betting amount. Playing on a single line can increase the bet by x20, while the maximum number of lines can generate a payout of x400 player’s bet.

Even a single Lock and Re-spin icon is enough for the player to activate the Re-spin bonus feature which then locks all the winning icons on their landing positions, potentially forming additional winning combos with new icons. 

With the landing of minimum 3 CSI symbols, players will trigger Free Spins, the number of which will depend on the number of icons that started the feature. Sessions of 5, 10 or 30 extra spins can be awarded and all the wins will be doubled during the Free Spins mode, once you start collecting the evidence. 

Who Spun It by Betsoft

Who Spun It is a tribute to the classic crime novel genre and Agatha Christie fans will be particularly appreciative of this slot. The moment you start spinning, the timer will go off, counting down the time until the Detective Mode is triggered. In the meantime, the player will collect coins, thus accumulating Free Spins which will be unlocked during the bonus feature. 

Once the Clue Collection is initiated, the gameplay will be moved to an alternate set of reels that has 3 different levels, each with its own set of icons. The levels are divided into Murder Weapon stage, Murder Location stage and Culprit Clue stage. Every time a winning combination forms on the reels, the player will receive both the payout and a clue that will indicate what the murder weapon is (poison, knife, noose, gun or wrench), where the crime took place (gazebo, dining room, study, kitchen or bathroom)  or who the perpetrator is. The number of symbols within the winning combination will determine how many clue points will be awarded and the player will move to a new level after collecting 5 points. 

When all three levels are down, the players will become eligible to trigger the Second Screen Bonus round. In order to do that, you must succeed in positioning the Evidence icon on just the right spot on the game screen – the very center of the middle reel. If you manage to do that, you will earn the privilege of selecting one of the suspects and interrogating them for bonus prizes. If more than one Evidence icon should land on the reels, the entire bet will be increased by a Scatter payout and you could end up with x60, x150, x300 or x600 bet increase. 

All five of the slot characters can land on the reels at the same time (each on a different reel) and if that happens, Free Spins will be unlocked. During the extra spins, the players can select a random character which, depending on their choice, will have the power of doubling the awarded spins, generating more Wilds, forming winning combinations that will be paid both ways, multiplying the winnings or turning an entire reel into a Wild reel.