Head to the depths of the ocean in the hope of discovering a jackpot in Nauticus, a 5 reel, 20 payline submarine themed slot from 2 By 2 Gaming. Featuring funky design, this deep see adventure comes with a pair of pick me bonuses as well as a free spins feature that offers up to 120 free sins with sticky wilds. Play from between 20p and £200 per spin.

The design in Nauticus is rather good – the reels are set inside the engine room of a submarine and have a real mechanical feel. Joining the lower value playing cards are an anchor, a pressure gauge, a diver under the water, an octopus and a frogman holding a light.

The frogman is the top payer – land 5 on 1 of the 20 paylines for a 250-coin reward. The shark is the game’s wild – it only hits on reels 2, 3 and 4 but replaces all other symbols apart from the scatters.

Nauticus comes with a trio of bonus features. First up is the Pick a Mine feature which is triggered by landing 3 or more mine scatters anywhere on the reels. You’ll be prompted to choose 1 of them and in the process win a cash prize.

Land 3 Bonus symbols (a porthole) anywhere to trigger the Torpedo Bonus feature – you’ll be taken to a new screen and given 3 torpedoes to fire. Each mine that you hit will reveal a cash prize and move you on to the next level. The more mines you destroy, the bigger the awards on offer.

Finally, there’s a Free Spins feature which is triggered by landing the Free Spins symbol – 3 will get you 10 free spins, 4 awards 15 with 5 offering 20, 40 or if you’re really lucky, 60 free spins.  Special wilds are added to the reels during this feature.

When they land, they will have a number on them, indicating how many spins they will remain frozen in place. This can be up to 5 free spins. You can re-trigger more free spins here too with up to 120 possible.

Nauticus is an entertaining slot – visually, it’s very well constructed. Adding to the atmosphere is a brooding backing track, complete with the mechanical clanks and bangs from the ageing submarine. It all comes together well.

The features are decent enough too, coming along at regular intervals. It’s here that you’ll make most of your money. Well designed and offering a nice range of features, a trip on the good ship Nauticus can be an enjoyable one. I also recommend you play Nemo’s Voyage from WMS which has a similar theme.