Mr. O Casino Bonus Codes and Promotions: Exclusive 100% No Rules Welcome Bonus | Up to 166% Halloween Bonus and Free Spins
Mr. O Casino Bonus Codes
Always read the casino’s bonus terms and conditions before participating in any promotion.
Contents
Mr. O Casino Casino at a Glance
Mr. O Casino is a new online gambling site that offers a variety of games, bonuses and promotions. Mr. O Casino has a user-friendly interface, a responsive customer support team and a fast withdrawal process. The site also features slots and table games sections from Spinlogic Gaming (RTG). Mr. O Casino is a great choice for anyone looking for a fun and rewarding online gambling experience.
| Established | 2023 |
| Software | SpinLogic Gaming (RTG) |
| Number of games | 200+ |
| Banking options | Binance, BTC, ETH, LTC, USDT, Visa, Mastercard, PayPal (USA only) |
| Withdrawal speed | Instant |
| Withdrawal limits | $4,000 per week (up to $12,000 – depends on player’s VIP level) |
| Licencing | N/A |
Restricted countries: Afghanistan, Albania, Armenia, Belarus, Bosnia and Herzegovina, Bulgaria, Costa Rica, Estonia, French Guyana, Guadeloupe, Iran, Iraq, Israel, Montenegro, Macedonia, Martinique, Mayotte, Reunion, Moldova, Myanmar, Netherlands, Pakistan, Romania, Serbia, Slovakia, United Kingdom, Zimbabwe.
Sister casino – Detective Slots Casino
Mr. O Casino Welcome Bonuses
Exclusive 125 No Deposit Spins and 100% No Rules Bonuses
400% Welcome Bonus and 400 Free Spins
Mr. O Casino extends a warm welcome to new players by offering an enticing welcome package. This package includes a substantial 400% match bonus, which can go up to an impressive $10,000, and a generous allocation of 400 free spins upon your initial deposit. To take advantage of this offer, a minimum deposit of $10 is required, and there is a wagering requirement of 40 times the sum of your deposit and the bonus amount.
The 400 free spins are distributed in increments of 80 per day over the course of 5 days and can be employed on specific slot games selected by the casino. Furthermore, Mr. O Casino boasts a loyalty program that rewards you with points for every wager you place. These points can be exchanged for cash or other prizes in the Mr. O Shop. In addition to the welcome package and loyalty program, the casino regularly hosts promotions that present opportunities to earn additional bonuses, Comp Points, and cashback rewards.
HOT! Up to 166% Halloween Bonus and Free Spins
66 No Deposit Spins for New Players
166% Bonus with Free Spins
The O League: Halloween Edition – $5,000 Grand Prize!
The O League: Halloween Edition
The O League is back – wrapped in cobwebs and glowing pumpkin lights – for an entire month of Halloween excitement! From October 1st to 31st, players can dive into this extended edition of the slot tournament for nonstop spins, spooky surprises, and a $5,000 grand prize.
If you love tricks, treats, and thrilling reels, this is your haunt for the season.
Eligibility: Deposit during the event period to join the fun! Every player who makes a qualifying deposit is eligible for The O League: Halloween Edition ($5,750 prize pool).
Scoring System: Rack up Comp Points every time you wager! Your points combine with your total deposits throughout the event – and to spice things up, daily deposits come with special multipliers: More than $300 in Daily Deposit Total 5x Multiplier | $100 – $300 in Daily Deposit Total 3x Multiplier | $50 – $100 in Daily Deposit Total 2x Multiplier | Less than $50 in Daily Deposit Total – No Multiplier.
Note: Your score is powered by both deposits and Comp Points – but remember, your deposits pack a little extra punch when it comes to the final leaderboard!
Prize Distribution: All tournament rewards will be credited on November 02, 2025. The prize is paid based on the place the player achieves in at the end of the tournament.
Mr. O Casino Daily Bonus Codes
HOT! 200% High Roller Bonus with Free Spins
High roller lovers! Enjoy low wagering 200% high roller bonus with added 50 free spins on top! Play bonus multiple times with deposits $100 or more!
Up to 35% No Rules Bonus
Enjoy a No Rules Deposit Bonus of up to 35% courtesy of Mr. O Casino! Get a maximum of $500 when you make a deposit of $1,430. This offer has no expiration date and can be activated using coupon code “24 FRENZY.”
Specifically, you can receive a 35% bonus for deposits of $100 or more, a 25% bonus for deposits ranging from $50 to $99, and a 15% bonus for deposits between $20 and $49. The terms for this bonus include a minimum deposit of $20, 1x wagering requirements, no maximum cashout limit, the ability to redeem the bonus code twice daily, and eligibility to play all games. Please note that standard bonus terms and conditions apply.
Daily 75% Bonus and 75 Free Spins
At Mr. O Casino, you can enjoy a fantastic 75% Daily Deposit Bonus, which can provide you with up to $1,000 in bonus funds, accompanied by 75 Free Spins. To take advantage of this offer, simply make a deposit of $20 or more. You’ll need to meet a 30x wagering requirement for the bonus funds, but there are no wagering requirements for any winnings you achieve from the free spins, which can be used on selected slots.
What’s even more exciting is that you can redeem this bonus code two times per day, giving you ample opportunities to boost your daily gaming experience. It’s a great way to make your gaming at Mr. O Casino even more enjoyable and potentially profitable.
Recommended slots
⭐⭐⭐⭐⭐
TOP AWARD IS 50,000x BET PER LINE ⭐ BONUS, BUY and GAMBLE FEATURES ⭐ EXPANDING WILDS
ABOUT MERLINS RICHES
- 5 reels, 25 fixed paylines slot from SpinLogic (RTG)
- Wild (subsitute) – Merlin. Substitutes for all other symbols except Scatter
- Scatter – Dragon. 3 or more scattre symbols pay when they appear anywhere on the gameboard.
- Bonus Symbol – Bonus Scepter. 3 or more scatters trigger the Bonus feature.
- Bonus Feature: The game switches from a 5×4 to a 5×3 gameboard. The player gets 3 Bonus Spins. With each Bonus Spin, all symbol positions are regenerated. Each symbol position can appear empty or with a Bonus or”+1 spin” symbol. There is a meter with different levels that counts the number of Bonus symbols that appear throughout the Bonus feature. For every 5 Bonus symbols collected, the meter goes up one level. The final level achieved indicates the win to be paid.
- Buy Feature: during the Base Game, the “Buy Feature” button will be available. The player can click on it and buy10 free games and play them directly. The price to pay for the 10 free games is the total bet 35x.
- Gamble Feature: Feature is triggered by Free Games and appears before the Free Games start. After triggering the Free Games Feature, the Gamble screen is displayed, giving a chance to win up to 50 Free Games.
- Synced Reels Feature: During the Base Game, for every spin, 2 random reels on the gameboard will be synched and identical to one another.
- Expanding Wilds Feature: During the Base Game, when a Wild symbol appears on the Synched Reels, the Wild will expand to fill the entire reel.
TRY MERLINS RICHES AT:
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DORAGON’S GEMS
TOP AWARD IS 50,000x BET PER LINE ⭐ CASCADING WINS ⭐ BUY AND BONUS BET FREATURES
ABOUT DORAGON’S GEMS
- 5 reels, 25 paylines slot from RTG
- Wild (subsitute) – Golden Dragon Egg. Substitutes for all other symbols except Scatter
- Scatter – Dragon Eye. 3, 4 or 5 scatters can trigger 7, 10 or 13 free games respectively.
- Cascading Wins with Added Wild and Multiplier Trail Feature: The Cascading Wins feature happens after every spin with winning symbols. After winning symbols are paid, all symbols contributing to winning combinations disappear from the gameboard. The bottom-most empty position of the gameboard is filled with a single wild. The remaining symbols fall to the bottom of the wheel-box and the empty cell positions are filled with new symbols coming from above. These new replacing symbols may contribute to new winning combinations.
- Multiplier Trail: The Multiplier Trail is active during all spins. After each Cascading symbols the Multiplier Trail will increase once.
- Buy Feature: The Buy Feature provides the ability to buy a Free Games triggering spin at any time. This feature costs the equivalent of 100x the current total bet
- Bonus Bet Feature: Feature allows the player to increase the odds of triggering the Free Games feature by adding more Scatter symbols to each reel at any time. When the player has this feature active, the current total bet will be increased by 25%.
- Free Games with Gamble option Feature: After triggering Free Games, the player may gamble all free games for a chance to win more free games. When triggering with 3 Scatter symbols, player has the option to gamble to win 10 Free Games, or lose his 7 free games. When triggering with 4 Scatter symbols, player has the option to gamble to win 13 Free Games, or lose his 10 free games. When triggering with 5 Scatters, player has no option to gamble.
TRY DORAGON’S GEMS AT:
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