
Looking to go on a deep sea treasure hunt, with hidden treasures, colourful marine life, and huge win potential? If you enjoy the high-quality casino games, the grand blue slot by Fa Chai (FC Gaming) is one of the deep-sea ones which is definitely much better than the ordinary fruit machines.
Combining stunning aquatic graphics with highly rewarding gameplay mechanics—including the fan-favorite Megaways system—this game is designed to thrill both casual players and high-rolling veterans. Under the pretty coral reefs and true sound effects, however, what's the actual math behind the game, and how can you maximize your chances of surfacing with a profit?
Our casino experts have broken down all the details and information you need to know about the game in this comprehensive, people-first pillar guide. Whether you're learning how its generous 96.59% RTP works or how to use its progressive multipliers, we give the trusted and unbiased information you need to play smarter. Let's go for a dip!
Grand blue is a high-quality video slot developed by the fast-growing software company Fa Chai (FC), which has long been recognized for its rich feature and graphics-rich Asian casino games.
Unlike the standard and static paylines, the game adopts modern and dynamic features. While you are spinning the reels, you will have dolphins, sharks, turtles, and even sunken treasure chests—all depicted in high-definition graphics.
Smart players always examine the game's statistics before wagering real money. This title has the following breakdown:
Why this matters: 96.59% RTP is a great result, and significantly better than the industry average of 96%. In mathematical terms, this is essentially a game that will pay back ₱96.59 for each ₱100 bet placed over a long period of time. Combined with Low to Medium volatility, this slot would be ideal for players who are looking to win small amounts often, rather than spending extended periods without wins.

Though very sophisticated, Fa Chai has created an extremely intuitive interface. It doesn't matter if you’re on your smartphone or a desktop monitor, here's how to get going with your underwater mission:
After loading, you will see a bottom of the screen control panel. To increase or decrease your wager size, use the "+" and "-" buttons.
The game has a Megaways-style engine, instead of the traditional slots that have a fixed number of paylines (such as 20 or 25). This means that the amount of symbols on each reel vary per spin and there are thousands of combinations to win, many of which can be unpredictable. The only way to win is to have matching symbols on the leftmost reel, adjacent reels.
For a faster pace, players can utilize the Autoplay function to spin a set number of times automatically.
Also, if a player wants to change Scatters' location without waiting for them to fall, the game also has a Buy Feature. This means that you can win a higher number of chips (a multiple of your base bet) and get to the Free Spins bonus round immediately.
You have to know which animals in the sea are most valuable to successfully plow these waters.
It's a gorgeous base game, but the high level of bonus features makes the huge payout potential soar.
Three or more Scatter symbols anywhere on the reels earn players the Free Spins Bonus round. In this stage, you will be given spins which will not be subtracted from your actual money. It's better still if you're able to score extra Scatters on this round, as these will also re-trigger the feature, giving you extra free spins too.
An Increasing Multiplier is added to the game during the Free Spins round. The larger the winning spin or chain of spins, the higher the multiplier (e.g., 1x, 2x, 3x and so forth). This is a game that can be played in Megaways, meaning that you can get several consecutive wins, which could multiply to incredible numbers during a spin.
Some of these games have a progressive jackpot system. The percentage of each player's wager feeds into a huge, ever-expanding jackpot that offers them a possible life-changing win on any random spin.
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Although no strategy ensures a win in slot games, you can use the smart tactics to make your slot session as optimal as possible.
We've found, after doing a ton of testing, that this game is worth your time for the following reasons:
For fans of grand blue with an underwater theme, be sure to explore these comparable works on our website:
At our casino, we prioritize your safety and promote responsible gambling.
This game has an RTP of 96.59%. This is on the high end of the competition and is above the industry average, so this game should provide a higher percentage return to players over a long session of play than a typical slot.
Yes. Many online casinos, such as OKBet, have a free-to-play trial mode. This gives players a chance to explore the volatility, mechanics and bonus mechanics of the game with virtual money before using real money.
Absolutely. If players land 3 or more of the Treasure Chest Scatter symbols anywhere on the reels, they trigger the Free Games feature. The round is triggered by the additional Scatters and there is an increasing multiplier for consecutive wins.
Yes. Fa Chai (FC Gaming) uses high tech HTML5 to create their games. This means that the slot is optimized for mobile, with no download required, and you can enjoy the action on Android and iOS devices without a hassle with its bright graphics and smooth performance.



















