Four Leaf Gaming was founded in late 2021 by John Quinn and Andy Hollis—former Microgaming executives who together have more than two decades of experience in product strategy and content launches. Their goal is simple: build online slots that put players first, offer clear mechanics and deliver reliable performance across desktop and mobile. Below is a detailed look at Four Leaf’s background, guiding principles and key titles.
Our expert team rigorously reviews each online casino before assigning a rating. This detailed assessment is based on a comprehensive scoring approach, focusing on aspects like reliability, the overall gaming experience, fee structures, quality of customer service, bonus system and other key factors.
19+, | New customers only • Min deposit C$10 (because of deposit policy) • 200x wagering • Opt-in required • Terms apply Full Bonus T&C
19+, | Offer only applies to new players. Full Bonus T&C
19+, | New Players Only. This bonus package is distributed across the initial two deposits made at the online casino. To become eligible for the bonus, a minimum depo...sit of C$10 per deposit is necessary. Full Bonus T&C
19+, | First Deposit Only. Min. deposit: $20. Game: Ninja Master, Spin Value: $0.10. WR 60x free spin winnings amount (only Slots count) within 30 days. Max bet is 10%... (min $0.10) of the free spin winnings and bonus amount or $5 (lowest amount applies). Free Spins must be used before deposited funds. Bonus Policy applies. Full Bonus T&C
19+, | New players only. Min Deposit: C$2. Wagering: 45x for Bonus/55x for FS. Expiration: 7 days from activation. Full Bonus T&C
19+, | You are eligible for one Welcome Offer which consists of: one first deposit bonus, one second deposit bonus, one third deposit bonus, one fourth deposit bonus a...nd one fifth deposit bonus per Thorcasino account which shall mean no more than one of each bonuses per user, IP address, computer device, family, residential address, telephone number, credit or debit card and/or e-payment account, e-mail address, and environments where computers are shared (university, fraternity, school, public library, workplace, etc.). Welcome offer is valid for all new qualifying customers of Thorcasino for their first five consecutive deposits only as specified below in following order; first deposit with bonus code THOR1, second deposit with bonus code THOR2, third deposit with bonus code THOR3, fourth deposit with bonus code THOR4 and fifth deposit with bonus code THOR5. Min deposit: 20 CAD. Max bet: 4 €. Restricted games: Jackpot Games, Table Games, Video Poker, Virtual Games, Live Casino and Sportsbook events. Full Bonus T&C
19+, | Welcome Bonus Pack applies to first 4 deposits. Minimum deposit of $20 required for each Bonus. Welcome Bonus Pack comprises: First deposit: 220% bonus up to 22...50 + 200 Free Spins on Dog House slot. Second deposit: 75% up to $575 + 75 Free Spins on Release the Kraken. Third deposit: 100% up to $750 + 50 Free Spins on Buffalo King Megaways. Fourth deposit: 125% up to $1875 + 125 Free Spins on Big Bass Bonanza. Each Welcome Bonus section includes detailed terms and conditions Full Bonus T&C
19+, | Bonus is not available for players based in ON. Offer valid on first deposit. Minimum deposit: $20. Bonuses must be wagered 35x. Free Spins: 10 per day over 10 ...days. Full Bonus T&C
19+, | Free Spins are distributed over 10 days, 10 spins per day. Free Spins must be used within 24 hours, and all bonus funds expire after 7 days. Full Bonus T&C
19+, | New players only. Min deposit C$10. Wagering requirements apply 35x, Offer valid for 72hr. 100 spins includes 3 deposit. Full Bonus T&C
Headquartered in Nevada, Four Leaf specialises in online slot development with a focus on player needs throughout design and testing. John and Andy involve operators, affiliates and actual players in each phase, ensuring feedback drives every feature. Their mission from day one has been to create games that balance excitement with straightforward play.
To keep design focused, Four Leaf follows these seven principles:
| Principle | Description |
|---|---|
| 1 | Put the player first — every decision balances features against user experience. |
| 2 | Create engaging sessions — each spin should feel meaningful and offer a chance for reward. |
| 3 | Maintain tension on every spin — use mechanics that build anticipation and reveal outcomes clearly. |
| 4 | Empower users and reward loyalty — include control options (like buy-features) and loyalty bonuses. |
| 5 | Challenge the norm — introduce new mechanics or variations on classic models. |
| 6 | Collaborate closely — gather input from operators, affiliates and players before official release. |
| 7 | Adopt new tech — use emerging tools (HTML5, server-side RNG, etc.) to improve stability and cross-platform play. |
Four Leaf Gaming’s leading titles are built around clear win-modeling, with several releases offering maximum wins above 20,000× and volatility settings calibrated between medium and high. These structures give the studio room to deliver high payouts without compromising feature consistency or hit-rate balance. The selections below highlight how Four Leaf applies those parameters across its most recognised games.

Four Leaf holds a Silver Bullet partnership with Relax Gaming, granting its games access to the Relax network and its operators. They also secured a licence from the Swedish Gambling Authority (SGA), enabling regulated distribution in Sweden and demonstrating their commitment to compliance in key markets.