OnlyPlay is the studio that invented a game format nobody else was building, kept quiet about it for a while, and then watched that format become one of the most talked-about mechanic categories in iGaming. OnlyPlay's roots date back to 2007, when it operated as a software outsourcing firm developing gaming solutions for third-party operators.
Headquartered in Lithuania with additional offices in Ukraine and Portugal, OnlyPlay is a mobile-first, interactive casino game provider focused on original mechanics, crash formats, and support for both fiat and crypto markets. The studio built its early catalog around lottery-style games, then expanded into crash titles, video slots, and instant-win formats.
OnlyPlay has earned four nominations at the prestigious SlotsWise Awards, including recognition in the Slot of the Year and Most Innovative Slot Provider categories, and received a nomination at the iGaming Idol Awards for their Rising Star category.
The studio maintains strategic partnerships with major aggregators including SoftSwiss and Slotegrator, enabling widespread distribution across iGaming platforms worldwide, and announced a partnership with NGX, a leading gaming technology provider, in 2025.
OnlyPlay Overview: License, Products, and More
Here's what you need to know about OnlyPlay before we get into the games.
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| Video Slots, Cascade Slots, Crash Games, Slottery, Instant-Win, Infinity Play, Crypto Games |
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| HTML5, mobile-first, browser-compatible |
| 4 SlotsWise nominations; iGaming Idol Rising Star nomination |
OnlyPlay Products
OnlyPlay has the most diverse format catalog of any studio reviewed in this series at its size. The range goes well beyond slots into multiple genuinely distinct game categories.
Video Slots
Video Slots cover standard 5x3 and 5x4 reel configurations across a wide range of themes. Slot games have always been central to what OnlyPlay does, with the catalog growing considerably since 2020 across a variety of unique themes and mechanics.
Cascade Slots
These are OnlyPlay's higher-volatility cluster pays titles. Piggy Bonanza is the flagship example, using a 6-reel cluster system instead of traditional paylines. Lucky Ferret, released in January 2026, is the newest and most commercially exciting cascade title, with a Super Cascade mechanic and a 25,610x max win.
Crash Games
These are arguably the category OnlyPlay is best known for in operator circles. Five crash games are available: Cricket Crash, Need for X, F777 Fighter, Quantum X, and Limbo Cat, with newer multiplayer crash titles. F777 Fighter allows two simultaneous bets. Players can set one on auto with a predefined bail-out point while playing the other manually.
Slottery
Slottery is OnlyPlay's proprietary hybrid format and the studio's most original contribution to the industry. Four Slottery titles are available: Wild West Girls, Lucky Punch, Myths of Bastet, and Jungle Gold. The format combines multilevel slot mechanics with lottery-style prize structures, creating a format that plays like neither a standard slot nor a crash game.
Infinity Play
This is a further proprietary game category covering formats like Joker Coins and similar titles that use an escalating multiplier collection system distinct from standard free spins.
Instant-Win and Tap Games
These round out the catalog. Piggy Tap, released as the studio's "ultimate summer tap game," represents OnlyPlay's entry into mobile-native interactive formats where quick reflexes and strategic tapping replace spinning reels entirely.
Fun Fact: OnlyPlay's Lucky Punch Exclusive features a character who bears a striking resemblance to Conor McGregor, complete with a matching fighting style and visual references.
OnlyPlay Special Features
In this section, we'll be looking at some of the special features that you'd find in Only Play's titles.
Slottery Mechanics
These are OnlyPlay's signature proprietary format and the feature most responsible for the studio's award nominations. Slottery combines the thrills of slots with lottery excitement, offering a multilevel format where players progress through stages with escalating prize potential. In Lucky Punch, players fight opponents across multiple levels, with each stage offering a different prize outcome.
Super Cascade
This is the mechanic powering Lucky Ferret, OnlyPlay's newest and highest-potential cascade title. Lucky Ferret uses a dynamic Cluster Pays engine where winning clusters transform into Golden Squares via Mirror symbols, which reveal instant cash coins, Collect symbols, and massive Lucky Boost multipliers through a Super Cascade chain reaction mechanic.
Dual Bet System
Dual Bet System in F777 Fighter is one of the most player-friendly features in any crash game currently available. F777 Fighter allows two simultaneous bets, with one set on auto at a predefined bail-out point while the other is played manually. Combined with real-time emoji reactions and visible player scores, it creates a genuinely social crash experience.
Progressive Jackpot
Progressive Jackpot is embedded in F777 Fighter and several other OnlyPlay titles. F777 Fighter includes a progressive jackpot where the amount depends on the size of your bet through that session. A max bet of 50.00 pays 100% of the jackpot. A bet of 5.00 pays 10% of the jackpot.
TNT-Booster, Progress, and Speed-Up
These are OnlyPlay's recurring in-game modifier mechanics that appear across the catalog to accelerate multiplier growth, add extra win opportunities, or compress a session's timeline toward the bonus trigger. These features sit alongside jackpot mechanics to deliver diverse experiences from one title to the next.
Cluster Pays System
Cluster Pays System powers Piggy Bonanza and the cascade slot category. In Piggy Bonanza, instead of lining up symbols on paylines, players form winning combinations by grouping identical symbols in clusters anywhere on the six reels. The cluster system, combined with high volatility, means each spin can produce nothing or cascade into a chain of hits.
Crypto and Multi-Currency Support
This is built into every OnlyPlay title from the ground up. OnlyPlay supports various fiat and digital currencies across the full portfolio, making every game crypto-ready without requiring a separate product line. For sweepstakes platforms that support cryptocurrency wallets, OnlyPlay integrates cleanly without additional configuration.
Top OnlyPlay Games
These five titles cover the best range of what OnlyPlay offers: the highest max win in the catalog, the flagship crash title, the signature Slottery game, the best cluster pays slot, and the newest breakout release.
- Lucky Ferret
The newest and most commercially impressive title in the OnlyPlay catalog, and the one that shows where the studio's development is heading in 2026. Released in early January 2026, Lucky Ferret is a vibrant high-octane heist adventure that swaps traditional paylines for a dynamic Cluster Pays engine.
Winning clusters transform into Golden Squares via Mirror symbols, revealing instant cash coins, Collect symbols, and massive Lucky Boost multipliers through the Super Cascade chain reaction mechanic.
- F777 Fighter
Did you know? You can try F777 Fighter and every other OnlyPlay game completely free in demo mode on SweepKing before playing with Sweeps Coins.
The crash game that defines what OnlyPlay means to most operators. F777 Fighter is an aviation-themed crash game released in January 2021. It includes a progressive jackpot where the payout is proportional to your bet through the session.
F777 Fighter allows two simultaneous bets. Players can run one on auto with a predefined bail-out point while manually managing the second. Real-time emoji sharing and visible player scores add a social layer that most crash games lack entirely. The dual bet system is the most player-friendly crash mechanic in any title reviewed in this series.
- Lucky Punch
The title that introduced the world to OnlyPlay's Slottery format and the game most associated with the studio's creative identity. Lucky Punch Exclusive is a boxing-themed multilevel Slottery game released in September 2019. Players fight against multiple opponents across unlimited rounds in a format that feels more like a game show than a traditional slot.
The multilevel fight structure means each session has a narrative arc. You're not just spinning for a jackpot trigger; you're progressing through opponents with escalating prize potential at each stage. For sweepstakes players who find standard slots passive, Lucky Punch gives you a format where progression feels earned rather than random.
- Piggy Bonanza
The flagship cluster pays title and one of OnlyPlay's most consistently popular slots across casino lobbies. Piggy Bonanza runs on 6 reels with a Cluster Pays system where players form winning combinations by grouping identical symbols anywhere on the reels.
The candy and pig visual theme is deliberately lighthearted, which contrasts well with the high-volatility math model underneath. Players who load Piggy Bonanza expecting a low-stakes casual game will find the variance more demanding than the pastel color palette suggests.
- Jack Potter
OnlyPlay's most widely distributed standard video slot and a reliable entry point for players who want a straightforward reel experience from the studio before exploring Slottery or crash titles. The western theme, wild multipliers, and free spins round cover familiar territory in a well-executed package.
The mid-volatility math model means wins come more regularly than in Piggy Bonanza or Lucky Ferret, making Jack Potter the better choice for players who want consistent session entertainment without the long dry stretches that high-volatility cluster games require. It's not the most innovative game in the OnlyPlay catalog, but it's the most accessible one for players new to the studio.
OnlyPlay Pros and Cons
Pros
- The Slottery format is genuinely original: No other provider reviewed in this series has built a multilevel lottery-slot hybrid format and trademarked it.
- Broadest game format range of any studio at this size: Crash games, Slottery, cascade slots, standard video slots, Infinity Play, instant-win tap games, and crypto-native formats are all real, invested product categories.
- Dual bet system in F777 Fighter is industry-leading: F777 Fighter allows two simultaneous bets, one on auto and one manual, with in-game social features including emoji reactions and visible player scores. No other crash game in any reviewed provider's catalog offers that combination.
- Certified by two independent labs: RNG integrity is verified by both BMM Testlabs and iTech Labs, which is a stronger dual-certification than many providers of OnlyPlay's size maintain. Both are globally recognized independent testing laboratories.
- Crypto-first infrastructure built in from the start: OnlyPlay supports various fiat and digital currencies and has 129 crypto-compatible games across the full catalog. For sweepstakes platforms with crypto integration, every OnlyPlay title works without additional configuration.
- Lucky Ferret's 25,610x ceiling is a genuine catalog highlight: The January 2026 release brings the highest max win figure in the OnlyPlay portfolio by a significant margin.
Cons
- RTP sits below average across most of the catalog: Most OnlyPlay titles carry a 95.5% RTP, which is consistently below the 96% industry benchmark and meaningfully below the highest-performing providers in this series.
- Some titles function as reskins of each other: Some OnlyPlay slots share matching features and similar game descriptions, with games like Piggy Bonanza and Crystal Treasure functioning as near-clones with different visual themes.
Final Thoughts
OnlyPlay is the studio for players who want to explore beyond the standard slot format without leaving the sweepstakes lobby entirely. The Slottery format in Lucky Punch is unlike anything else available at SweepKing. The dual bet system in F777 Fighter is the most player-friendly crash mechanic in the industry.
The 95.5% RTP that runs through most of the catalog is the main thing to be aware of before committing to longer sessions. It's not a dealbreaker, but it's consistently below the industry benchmark, and players who track return rates will feel that difference over time compared to providers like Expanse Studios or Habanero on their best titles.
For players who've worked through the standard slot libraries and want formats that feel genuinely different, OnlyPlay is one of the most interesting catalogs in the SweepKing lobby. Start with F777 Fighter if you want the crash game experience, Lucky Punch if you want to understand what Slottery actually means in practice.
