10 New Slot Releases to Watch in September 2025
LISTEN TO THIS ARTICLE:Each month brings a steady stream of new slots, and September 2025 looks set to deliver another thrilling lineup of games. Well-known developers and upcoming studios alike are releasing titles that cover a wide mix of styles, so players of every taste are well catered for. Below, we’ve chosen ten of the most exciting online slots arriving this month so that you know what to look out for in the coming weeks.
Book of Madness 2 Slot from Gamomat – Tuesday, 2nd September 2025
If you’re looking for something to restore your sanity after the long summer holidays, then this may not be quite what you had in mind, but it does look insanely exciting. Gamomat is taking players to the shadows with Book of Madness 2, a horror slot set in an abandoned hospital where danger hides in every corridor. The reels are filled with terrifying imagery, from deranged patients to the bloodstained nurse, while the soundtrack helps build an uneasy atmosphere. Played on a 5x3 grid with 10 paylines, the game stays true to the classic "Book of" style, but the chilling visuals give it a fresh layer of intensity.
As expected, the Book symbol acts as both wild and scatter, substituting for other symbols while also triggering 10 free spins. During the bonus round, one symbol is chosen to expand whenever it lands, and each retrigger adds another expanding symbol, with up to nine available in total. The high volatility means big wins are possible, while the 96.11% RTP and 30.38% hit frequency keep the action balanced. If you’re brave enough to spin the reels, the rewards can reach a top payout of 11,800x the bet.
Bamboo Ways Slot from Push Gaming – Wednesday, 3rd September 2025
Push Gaming is bringing players back to the forest with Bamboo Ways, a high-volatility slot that combines Eastern serenity with plenty of features. Set among lush green groves, the reels are framed by swaying bamboo and mystical pandas, which act as guardians of fortune that appear alongside golden artifacts and oriental symbols. Starting with a 5x3 layout and 729 ways to win, the grid can expand up to 46,656 ways as rows unlock through cascades and instant prize wins.
Mystery symbols can reveal paying symbols, wilds, converters, expanders, or the Golden Bamboo. Expanding wilds cover entire unlocked rows, sometimes with multipliers of up to x5, while converters turn matching symbols into wilds for dramatic wins. Free spins adjust the starting grid, remove low-value icons, and boost multipliers for even bigger Golden Bamboo rewards. With its blend of tranquil visuals and explosive mechanics, Bamboo Ways offers a thrilling slot experience that is only enhanced by the maximum payout of 25,000x the bet.
Take the Money Slot from Red Tiger – Thursday, 4th September 2025
Red Tiger is inviting you to pull off the ultimate bank heist in Take the Money, a high-volatility slot with 5 reels, 3 rows, and 25 paylines. The action takes place in a steel-framed vault where masked robbers, piles of cash, and expensive watches fill the reels. A scary clown mask character is in charge of proceedings, and wild symbols can help by awarding up to 400x for a full line. With its gritty design and crime-driven atmosphere, the slot is sure to keep you on the edge of your seat.
The game’s core mechanic is the Bank Heist, which takes place over cycles of 20 spins. During each round, players build up a Score through Gold Coins, Big Heist prizes, and multipliers, while Cut symbols raise the percentage of the Score that can be collected. At the end of the cycle, the Score is paid according to the Cut value, and the free spins provide further chances to lock in Coins, Multipliers, and Cuts. If you pull off a successful heist, then you could win a maximum payout of 10,000x the bet.
Dead Men Walking Slot from Nolimit City – Tuesday, 9th September 2025
Nolimit City is known for its miserable themes, and the developer’s next release is no exception. Dead Men Walking is a grim slot that will take players to the gallows. Played on a 5x3 reel set with 17 paylines, the slot is packed with energy, complete with fire pits above the reels that ignite when special features are triggered. With its mix of blood-soaked atmosphere and varied features, Dead Men Walking is sure to draw players into its dark energy.
The action is driven by Nolimit City’s usual mechanics, including xWays, which expand symbols into stacks, xSplit, which divides symbols and increases win ways, and xNudge, which adds multipliers as stacked wilds nudge into position. Infectious Wilds can spread across the reels, while the Dead Man’s March sees wilds move leftwards and transfer multipliers as they go. The bonus game offers two modes: Dead Man’s Gold, where coins with collector, cloner, multiplier, or reset effects fill a 5x5 grid, and Reaper’s Gold, which upgrades these mechanics for even bigger payouts. Perhaps most excitingly, Dead Men Walking offers a maximum payout of 25,313x the bet.
GoldStorm Ultra Slot from Yggdrasil Gaming – Thursday, 11th September 2025
If you prefer something a little more traditional, then Yggdrasil Gaming has the answer in September with GoldStorm Ultra, a high-volatility slot that transports players to the neon lights of Las Vegas. Played on a 5x3 grid with 20 paylines, the game uses familiar symbols such as bars, sevens, bells, stars, and dollar signs, all set against a glittering backdrop with an upbeat electronic soundtrack.
The slot revolves around wild multipliers of up to x5, as well as two progression meters that unlock either free spins or super free spins. Regular free spins introduce sticky wilds and retriggers, while super free spins expand the play area to two gaming grids, which can lead to bigger wins. Both features can also be bought directly for those who prefer quicker access. For players chasing the Vegas dream, GoldStorm Ultra promises high-paced action with a top payout of 4,000x the bet.
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AstroPop Slot from AvatarUX – Friday, 12th September 2025
Prepare to embark on an interstellar adventure with AstroPop, a futuristic slot built around AvatarUX’s MultiPop mechanic. Set against a galactic city, the 5x4 grid offers 1,024 ways to win, which expand to 3,125 during free spins. Each reel cell carries its own multiplier, increasing by +1 or +2 whenever it forms part of a winning combination. The sci-fi visuals, alien symbols, and thrilling soundtrack make every spin truly exciting.
As multipliers grow, reaching x5 or higher can trigger a Wild Throw, which adds extra wilds to the reels. Three or more scatters unlock the free spins round, which expands the grid to 5x5 and carries over multipliers for bigger potential. Players can gamble to boost their free spins before the feature begins, while starred cells add additional spins during play. With its mix of cascading wins, sticky multipliers, and features, AstroPop delivers a thrilling space adventure that could lead to payouts of 10,000 times the bet.
Swoll Slot from Shady Lady – Monday, 15th September 2025
Health and fitness enthusiasts may want to try Shady Lady’s upcoming release, Swoll, a tongue-in-cheek slot that pokes fun at the world of bodybuilding, supplements, and gym-obsessed lifestyles. Played on a 5x4 grid with 1,024 ways to win, the reels are packed with tanning oil, raw meat, and muscular characters in leopard print. The wild symbol is a can of energy, but the real focus is on the stacked Swoll symbols that dominate the action.
The Swoll feature sees stacked symbols generate coin values and multipliers, with adjacent Swolls merging to combine their rewards. Enhancements such as Nudge, Slide, and Roid Rage help symbols line up for even bigger payouts. Free spins and super free spins add guaranteed nudges and slides, while boosters and bonus buys in the in-game Store allow you to customize your session. With its irreverent humor and explosive mechanics, Swoll captures the chaotic fun of the gym floor and gives you the chance to lift a maximum payout of 20,000x the bet.
Ninjaz vs Narcos 2 Slot from Kalamba Games – Thursday, 18th September 2025
Kalamba Games is preparing to release Ninjaz vs Narcos 2, a wild follow-up to the popular original that brings together 80s-inspired style with over-the-top action. The slot is played on a 6-reel grid with a 5-4-4-4-4-4 layout, resulting in 5,120 ways to win. Characters wearing bright ninja gear clash with flamboyant gangsters on the reels while the atmosphere is enhanced by a pounding soundtrack. The volatility is high, and with HyperBet levels to choose from, players can tailor the experience to suit their budget.
Central to the action are K-Cash symbols, which appear in both the base game and free spins to award instant prizes. The HyperBet feature allows players to pick from Classic Mode, Mr Yellow, or Like a Boss, and the latter introduces multipliers of up to x10. Free spins see Mr Green collect Narcos for additional wins, while retriggers keep the feature going. With its outrageous characters, feature-packed gameplay, and explosive mechanics, Ninjaz vs Narcos 2 offers the chance to win big with payouts reaching up to 20,000x the bet.
Gems, Bombs & Gold Slot from Just For The Win – Monday, 22nd September 2025
If you like digging for wins, then Gems, Bombs & Gold is the slot for you. The theme is classic mining with flickering torches, TNT, and gems filling the reels. Clusters form the basis of wins, but bombs play a central role by detonating to connect adjacent tiles and turn rubble into winning combinations. Adding to the excitement, money symbols can appear that are worth up to 250x the bet and are collected instantly when part of a winning cluster.
The bonus round features sticky wilds that remain fixed for the duration of play, while money symbols can stack winnings over multiple spins thanks to a persistent collection mechanic. The Super Bonus is even more exciting with three sticky symbols already in place, which gives players an early boost toward bigger wins. With its volatile mechanics, cascading explosions, and instant cash rewards, Gems, Bombs & Gold from Just For The Win offers the chance to dig up a payout of 10,187x the bet.
Epic Fish Marlin Madness Slot from Quickspin – Tuesday, 23rd September 2025
Quickspin is taking you fishing in the Coral Sea in Epic Fish Marlin Madness, the latest addition to its Epic Fish series. Played on a 5x3 grid with 10 paylines, this fishing-themed slot features money symbol collection and a progression-based free spins bonus. On the reels are symbols including hooks, worms, turtles, and a range of sea creatures, while wild fisherman collectors reel in fish prizes worth up to 25x.
The key features include Fish Collection, where wilds gather all visible fish prizes, and Shark Attack, which randomly replaces low-value symbols with fish for extra rewards. The free spins come in three tiers, Black Marlin, Nudge Up, and Hooked, and each adds more modifiers and retrigger opportunities. The Black Marlin itself carries a multiplier that starts at 30x and can climb to an incredible 5,000x. Epic Fish Marlin Madness promises to deliver a lively sea adventure enhanced by the chance to land a maximum payout of 7,673x the bet.
Plenty More Coming This September
We’ve picked the online casino games above as they represent an excellent cross-section of the range of creativity coming to players in September. However, there is much more to discover with a steady stream of new slots from different studios, each with its own mix of themes and features. Whether you prefer ultra-modern themes, traditional fruit machines, or something in between, there will be no shortage of new games to try out on the new games page of your favorite online casino this month.
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