We’re off on more adventures with the best new online slots of the week for May 23, 2025. Hit the adventure trail with Boomerang Studios or play Enjoy Gaming’s slick Irish-themed slot: Emerald Frenzy. You can even give these top new slots a play for free.
We start our look at the best new online slots of the week with 3 Wonders: Underworld Kingdom. New from Boomerang Studios, the Indiana-Jones-inspired slot offers a jackpot worth nearly 5000x.
Emerald Frenzy is a new Irish-themed slot from Realistic Games. Win up to 10000x on a single spin or trigger wild multipliers.
Buffalo Wild Charge is a Hold & Win slot from Enjoy Gaming. You can activate regular Hold & Win re-spins, or super-charge the feature for additional bonus payouts.
We end our round-up of the best new online slots of the week with Space War from FunTa Gaming. Shoot extra-terrestrial bad guys and bag cash wins in this outer-space-themed instant-win game.
As ever, you can try all these best new online slots of the week for free at VegasSlotsOnline. Click the links provided to enjoy the hottest demo-play slots in your browser.
3 Wonders: Underworld Kingdom by Boomerang Studios
Venture into the 3 Wonders: Underworld Kingdom and enjoy a Hold & Win feature with modifiers galore. Win up to 4965x stake as you brave perils and bring home the treasure.
Boomerang Studios comes rebounding with a thrill-seeking slot for this summer: 3 Wonders Underworld Kingdom. It’s a five-reel slot with a max. base game jackpot worth 4965x.
The game takes place in a Tomb-Raider-esque adventure playground filled with dinosaurs and precious crystals. Wild symbols replace regular icons in the game to complete paylines. Plus, the wilds nudge up or down to complete reel fills.
You trigger a range of random features by hitting three or more idol scatters. The bonus works like a Hold & Win feature with modifiers that can all happen simultaneously.
You can land valuable treasure maps that pay up to 10x stake. In addition, you can upgrade prizes with coins that enhance payouts by up to 10x the total bet.
The RTP of 95.53% is a touch lower than the 96% we’d expect to find on modern bonus slots. However, the plethora of adventure-themed bonus features means you can land some great prizes.
Ready to take a journey of adventure? Try 3 Wonders: Underworld Kingdom for free at VegasSlotsOnline.
Emerald Frenzy by Realistic Games
Realistic Games release Emerald Frenzy this month, and Irish slot with more bonuses than you can shake a shamrock at.
Realistic Games turns on the Rainbow Riches magic with Emerald Frenzy, a new slot out this month. It’s a 4096-ways-to-win slot with a strong Celtic theme – leprechauns, shamrocks, and all.
Like all good 4096-ways slots, you play Emerald Frenzy on a six-reel set-up. That can lead to stacked reels and payouts for six-of-a-kind combos.
Prize symbols can land anywhere and are priced at 0.5x–15x total stake. You may also land jackpot prize symbols worth 25x–5000x. The collector symbol gathers all cash and jackpot amounts and pays out immediately.
You have a choice of features when you land 3+ bonuses anywhere. You can opt for 8–30 Emerald free spins and a choice of 2 to 7 Frenzy spins.
Wild multipliers of 2x to 5x may appear during the Emerald free spins round. You may also trigger 5–30 additional free spins.
Only cash symbols, jackpot icons, and the Collector appear during the Frenzy Bonus. A Collector symbol is guaranteed to appear on reel 1, ensuring a payout every time.
Emerald Frenzy is ideal if you love Irish-themed slots or Hold & Win bonuses with collect symbols. Play it for free now at VegasSlotsOnline.
Buffalo Wild Charge by Enjoy Gaming
Hit the open range with Buffalo Wild Charge by Enjoy Gaming. Trigger Hold & Win, or super-charge the feature with bigger multipliers and fixed jackpots.
Enjoy Gaming has been turning heads with its live casino offerings and classic slots. However, Buffalo Wild Charge is an interesting Raging-Rhino-style slot that ramps up the action with four fixed jackpots.
The Hold & Win bonus is the big feature of Buffalo Wild Charge. You trigger Hold & Win by hitting six bonus symbols (including Sticky Bonus icons or the jackpot symbols).
You play through re-spins where only bonus symbols, jackpot icons, and the Collect symbol appear. Sticky Bonus symbols award anywhere from 5x–9x stake.
Meanwhile, Mystery symbols transform randomly into bonus or jackpot symbols. Once you hit a Collect symbol, you are awarded the total of all cash sums displayed on the reels. It’s also possible to trigger a Super Hold & Win bonus with higher multipliers.
Buffalo Wild Charge rises above standard Hold & Win slots with the addition of the Buffalo Bonus. Only buffalo and jackpot symbols appear during this feature.
You can trigger multipliers worth up to 32x, or hit Mini, Minor, Major, or Grand fixed jackpots. The Grand Jackpot is fixed at 4000x stake.
The Hold & Win format is offered more and more by slot developers. However, not many providers are super-charging their Hold & Win features in the way Enjoy Gaming has done. Hit the Buffalo Wild Charge today and see if you enjoy gaming more after playing.
Space War by FunTa Gaming
Head into the Space War with FunTa Gaming’s awesome instant-win arcade game. Take out asteroids, aliens, and satellites to guarantee a win.
We’re cheating a little with our last of the best of the new online slots of the week. Space War is FunTa’s addition to a growing range of instant-win space-themed games.
Instead of spinning reels, you must shoot aliens out of the sky to win cash prizes. Every laser shot costs you cash, but you win for every ship or alien that you dispatch. Therefore, Space War can be volatile as you burn through cash (and lasers) while waiting for that big win.
Space War’s big selling point is its Autoplay function. You can set the Auto Fire frequency or stop loss/win limits before you play.
Plus, you can select automatic targets to focus on. Click on the ships, asteroids, or aliens to focus your firepower on the right symbols. This helps conserve your lasers and ensures a better profit.
The beauty of Space War is its multi-player functionality. Like other games in this genre, you can compete against three other online players simultaneously. Some online casinos offer special prizes for the best-performing starfighters.
Ready to take aim in the Space War? Try the game for free here at VegasSlotsOnline.
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