Howl-O-Ween

Released on September 24, 2025, Howl-O-Ween from Rival software developer brings a touch of Victorian horror to the slot reels. 

This title is built for players who like intense, high-risk gameplay with serious payout potential, offering wins of up to 20,000x the stake. 

With extreme volatility and a collection of strong features, it caters mainly to experienced players who enjoy the thrill of feature-heavy slots with a dark, cinematic edge.

Theme and Symbols

Howl-O-Ween draws inspiration from old werewolf folklore, setting the scene in a misty Victorian landscape where mystery and fear intertwine. The visuals are sharp and detailed, leaning into a realistic gothic art style instead of the playful Halloween look many themed slots go for. 

Every element—from the muted color palette to the atmospheric lighting—contributes to a setting that feels both haunting and elegant. It’s the kind of presentation that appeals to players who appreciate moody, story-driven design rather than lighthearted seasonal fun.

Betting Options and Special Features

This slot runs on a 243-ways-to-win system, meaning wins can form in multiple directions across the reels. The RTP sits at 96.25%, a solid benchmark in the current market. 

With extreme volatility, players can expect longer stretches between hits but with the potential for standout payouts when the right combinations land. 

The structure rewards those who prefer higher-stakes play or enjoy the tension of unpredictable spins rather than steady, smaller wins.

Rival packs Howl-O-Ween with several mechanics tied neatly to its werewolf theme:

• Werewolf Wilds – These appear throughout the game, substituting for other symbols to help complete winning lines.
• Full Moon Fury Expanding Wild Re-Spin – When a Wild lands on the third reel, it expands to cover it entirely and triggers a re-spin, adding a second chance at forming new wins.
• Howling Riches Hold & Win Bonus – This feature takes players to a separate screen where in-game jackpots can be claimed. It offers a break from the base game’s tension and serves as the main route to big rewards.
• Bonus Buy Option – For those who prefer skipping straight to the action, this option provides instant access to the Hold & Win round.

These features keep the gameplay engaging without overwhelming players with unnecessary mechanics, maintaining a balance between simplicity and depth.

Conclusion

Howl-O-Ween is one of Rival Gaming’s more atmospheric releases, combining a dark Victorian aesthetic with high-volatility mechanics. The trio of features—Expanding Wilds, Re-Spins, and the Hold & Win Bonus—offers enough variation to keep long sessions interesting. Compared to the Rival’s lighter or more colorful titles, this one clearly aims at players who enjoy brooding visuals, intense risk, and feature-driven gameplay.

It’s best suited for seasoned players who appreciate the combination of moody design and bold payout potential, especially those looking for a Halloween slot that feels more mature than playful.