
Reel Kingdom’s popular Big Bass series takes an exciting new direction in this spy-themed fishing slot. Along with high volatility and an above-average RTP, Big Bass Mission Fishin’ offers a top prize of 5,000x your bet. On top of that, two bonuses — the Free Spins round and the Stack the Cash feature — could give you extra chances to win, too! Find out all you need to know about this dynamic game in our Big Bass Mission Fishin' review — we'll cover the symbols, the betting options, and much more.



The Big Bass Mission Fishin' slot uses a 5x3 grid and 10 fixed paylines. You need to land at least three matching symbols on any line to win a prize. Bets range from £0.10 to £250 per spin.
As this is a highly volatile slot game, payouts might not trigger as often as they would in games with lower volatility. The theoretical RTP is 96.50%, which is higher than the average for slots, and the maximum win is 5,000x your bet.
You’ll find Big Bass Mission Fishin' at some of the biggest online casinos in the UK right now. But where should you play it? Here are the best slot sites to try:



Like other Big Bass fishing slots, this entry in the popular series takes place underwater. You’ll see fish swimming by, bubbles rising to the surface, and the water’s surface rippling gently. Exciting music with a mysterious feel plays in the background.
But unlike most other fishing slots, Big Bass Mission Fishin' is set at nighttime — perfect for a spy to make their move undetected. In this case, the stealth operator in question is the fisherman, who serves as the WIld symbol. I’ll explain how it affects the gameplay later in my Big Bass Mission Fishin' review.
The symbols on display include a grappling hook, a high-tech tackle box, a dragonfly, and standard royals. But the most valuable symbol is a sleek black boat speeding across moonlit water: land 5 on a payline to win 200x your bet.

Ten
3 – 0.20x bet / 4 – 1x bet / 5 – 5x bet

Jack
3 – 0.20x bet / 4 – 1x bet / 5 – 5x bet

Queen
3 – 0.20x bet / 4 – 1x bet / 5 – 5x bet

King
3 – 0.20x bet / 4 – 2.50x bet / 5 – 10x bet

Ace
3 – 0.20x bet / 4 – 2.50x bet / 5 – 10x bet

Tackle Box
3 – 2x bet / 4 – 10x bet / 5 – 50x bet

Grappling Hook
3 – 2x bet / 4 – 10x bet / 5 – 50x bet

Dragonfly
3 – 3x bet / 4 – 15x bet / 5 – 100x bet

Boat
2 – 0.50x bet / 3 – 5x bet / 4 – 20x bet / 5 – 200x bet
The Big Bass Mission Fishin' slot game was developed in HTML5 to work on mobile devices, and it looks superb on small screens. You can play in portrait or landscape on a smartphone or tablet. But whichever mode you prefer, the visuals are just as slick as in the desktop version.



Along with cash prizes, you can also reel in bonuses in the Big Bass Mission Fishin' slot. Here’s a quick breakdown of each one:
The Wild symbol only appears in the Free Spins round. It substitutes for every paying symbol (not the Money or Scatter symbols).
Fish Money symbols have a random money value on each spin, but you can only win these in the Free Spins round. The value may be 2x, 5x, 10x, 15x, 25x, 50x, 100x, 200x, 500x, or 5,000x your bet.
If you match three or more Scatters during the base game, you’ll trigger the Bonus Selection event. But even landing just two Scatters may still give you a chance to unlock it.
How? A respin might trigger and add a third Scatter, or a hook could pull one of the reels up to reveal it instead.
With three Scatters in place, you can choose between two features:

You’ll win 10, 15, or 20 free spins for 3, 4, or 5 Scatters, respectively. At the start of the Free Spins round, click on one secret file at a time to reveal modifiers. These include extra Wilds and more free spins.
Wild symbols collect the values of all Money symbols from across the reels. But Wild symbols are also gathered, and each fourth one you claim awards 10 more free spins. It also boosts the multiplier for all Money symbols collected (up to a maximum of 10x).

The Stack the Cash round only uses Coin symbols and blank positions. Coin symbols carry random values of between 1x and 25x your stake.
This feature awards four initial respins, but the meter resets each time you land a Coin symbol. These symbols stay in place. Bombs can also drop on random reels to double the values of all Coin symbols in the positions affected.

If you’ve played any of the other Big Bass fishing slots, you’ll probably know what to expect from this game. But the spy element breathes fresh air into the established style, and the Stack the Cash bonus adds more variety.
Otherwise, the Money symbol collection is essentially the same as before, and the max payout is decent but unexceptional.
While there may not be much here to surprise regular Big Bass players, this is still another strong entry in the series and may appeal more to newcomers.
Rating: 7.0
Here are a few frequently asked questions: