Bob Marlin Goes Deep: Slot Overview

Once again, players, it’s time to settle in, picture the sea breeze on your face, and daydream about hauling in fish while taking a punt. The studio running this excursion is Yggdrasil Gaming—hardly the first name you’d link with fishing slots, though they have featured aquatic themes on their grids before. And it’s not only fish you’ll see here. In Bob Marlin Goes Deep, a cheerful angler keeps you company as you try to grow the active play area, connect with super high-paying symbols, and that’s largely the core of it, as this isn’t a fishing slot built around a collector that “hooks” money symbols.

Bob Marlin takes centre stage, standing alongside players at the reels as they chase fish and wins. The opening screen does a nice job of setting the tone, showing Bob at the bow of a boat cutting through fish-packed waters under a bright blue sky. Once you enter the game, the visuals are a bit less captivating, yet the overall vibe remains upbeat, giving enough momentum to keep spinning to see what might turn up.

Press play and Bob cranks the handle to set the 5×4 reelset in motion. The game starts with 1,024 ways to win, though that can climb to 16,807 once the reels expand to their 7-row high maximum. Bets range from 10 c to $/€125 per spin, and at that level players can get a healthy 96.8% RTP (with a 90.5% version also out there). If the maths is anything to go by, this isn’t exactly Jaws territory, as it’s a low volatile slot.

On any spin, low-paying J-A royals and higher-paying cans, hooks, reels, and tackle boxes can appear. The blue, green, purple, or red super high-paying symbols, however, only show up during Collection Free Spins. Five matching low symbols pay 0.6x, five matching high symbols return 0.8x-1.4x, and five super highs award 2.8x-4x the bet. Mr Marlin manages without wild symbols on the reels.

Bob Marlin Goes Deep: Slot Features

Bob Marlin’s goal is straightforward: land scatters, grow the reels, gather fish, and either set off standard free spins or—if the catch is good—trigger Collection Free Spins where the super high pay symbols can appear.

Expanding Reels

Scatters can land on the leftmost, middle and rightmost reel, and every time a scatter hits, it adds an extra row to the bottom of the grid. The reels may expand by up to 3 rows in total. Reel height resets between base game spins.

Free Spins

Landing 3 scatters awards 10 free spins, played on a fully expanded 5×7 matrix. During free spins, scatters and Collectable symbols do not appear.

Collectible Symbols

Collectable fish symbols show up only on the 3 expanded rows in the base game, and players receive 3 Orange fish the first time they play. Collecting 5 identical fish grants 5 Collection Free Spins. If multiple collections are completed at once, the related free spins are awarded in the order: blue, green, purple, and orange. When Collection Free Spins and regular free spins trigger together, the regular free spins are played first.

Collection Free Spins are played on a 5×7 fully expanded grid and include super high-paying symbols that match the colour of the fish collected. They run using the average bet value of all bets placed while completing the collection. Collection Free Spins do not include scatter symbols or Collectable fish.

Bob Marlin Goes Deep: Slot Verdict

Bob Marlin Goes Deep didn’t deliver a particularly strong first impression, and after checking the rules and watching it run through a handful of spins, the small spark of curiosity it created faded quickly. It’s a peculiar release and a long way from Yggdrasil Gaming’s best work. The studio has handled watery themes before—through games like the Golden Fish Tank range, or via partner studio 4ThePlayer’s 4 Fantastic Fish series, for instance. With Bob Marlin Goes Deep, it was genuinely difficult to pin down what it was aiming for. For very gentle sea-themed play and a solid default RTP (if you can access it), it could still suit some players.

Even though it avoids the common “collector symbol hooks money symbol” formula, the gameplay became repetitive in a hurry. The base game moved along slowly, with the occasional extra row added when scatters landed. A cascading win mechanic might have helped the expanding reels feel more meaningful, because most of the time the grid grew by a single row, achieved little, then dropped back down for the next spin as Bob continued his voyage. Fully expanding the reels by landing three scatters and entering free spins isn’t especially transformative either, since nothing notably different happens beyond having a full grid for the duration. With neither Collectable fish nor scatters appearing in free spins, they don’t generate much excitement. Collection Free Spins are a touch more interesting thanks to the so-called super high pay symbols being able to land there, but still.

Once the boat was back at the dock, Bob Marlin Goes Deep hadn’t left much of a mark, and given how many fishing slots are available, it’s fair to wonder how many players would pick this over the alternatives. The default RTP is appealing, and a winning potential of 3,905x isn’t the worst around, but by the end, the game’s pull felt closer to a soggy fish finger than premium bluefin tuna.