Adventures of Doubloon Island: Slot Overview

Hot on the heels of Assassin Moon—a secret-agent slot that shares a number of comparable ideas—Microgaming partner Triple Edge Studios delivers this pirate adventure called Adventures of Doubloon Island. The main attraction is still the trademarked HyperHold mechanic, although this time it’s been adjusted in a way that, oddly, results in even smaller rewards. Alongside a scaled-back hold & win feature, there are various tweaks and changes, plus a new theme, which helps set the two titles apart.

The journey starts well thanks to appealing visuals that welcome you as the game loads. Built on a 5×3 layout with 20 paylines for landing wins, the reels sit on what resembles blank parchment, like an unfinished treasure map. The interface feels cleaner than Assassin Moon and doesn’t lean as heavily into its setting. It’s certainly attractive, but it doesn’t feel as distinctive or as immersive as Assassin Moon, where the espionage vibe left more room for the imagination to roam. Pirate slots are everywhere, so despite looking good, Adventures of Doubloon Island comes across as the less compelling option.

Positioned above the reels are four fixed jackpots showing values that change with your stake and depending on whether the Win Booster is enabled—turning it on raises the bet. Rated Medium volatile and offering a 96.01% RTP, Adventures of Doubloon Island runs on any device, with stakes ranging from 10 p/c to $/€75 per spin.

There are eight standard paying symbols in total—four higher-value and four lower-value. The low symbols are glittering card suits: diamonds, hearts, clubs, and spades, while the premiums include a pair of swords, a parrot, and two swashbucklers. You’re aiming for five of a kind, with top symbol payouts sitting between 10 to 20 times your stake. The female buccaneer acts as the wild and can appear on any reel in 1×1, 1×2, or 1×3 sizes. Five wilds pay 50x the bet, which, for anyone who played Assassin Moon, is a huge step down—from 12,500x for a full screen, down to 1,000x.

Adventures of Doubloon Island: Slot Features

Although the feature set resembles what came before, it’s been dialled back, which makes Adventures of Doubloon Island less appealing if you’re chasing big-win potential. The standout moments still come from the HyperHold feature, supported by free spins and the Win Booster.

The Win Booster is an optional setting that increases the bet by 1.5x when turned on. It doesn’t change standard line wins, but it does raise the value of rewards during the HyperHold feature. Cash prizes are increased by 3 times, and jackpots receive a 2-2.5x boost. You can toggle Win Booster on or off at any point in the base game.

Hit 6 or more HyperHold symbols and you activate the HyperHold feature. You receive 3 spins, and the triggering symbols become held in position. Each time additional HyperHold symbols land, the spin count resets. The feature finishes when every position is filled or when the spins drop to zero. Either way, the symbols left on screen then reveal a cash prize of 1-50x the bet with the Win Booster disabled, or 2-100x the total bet if it’s enabled.

Symbols can also uncover one of the four jackpots. Mini, Minor, Major, or Mega pays 25x, 100x, 500x, or 2,000x the bet with Win Booster off, or 33.33x, 133.33x, 666.67x, or 3,333.33x the total bet when the Win Booster is activated.

The last feature is free spins, which start when 3, 4, or 5 scatters appear, awarding 10, 15, or 20 free spins. The key advantage is that all low pay symbols are removed from the reels, leaving only premium symbols in play. The bonus can be retriggered too, since landing 3, 4, or 5 scatters adds another 10, 15, or 20 free spins.

Adventures of Doubloon Island: Slot Verdict

On the surface, Adventures of Doubloon Island looks a lot like Assassin Moon. HyperHold is still the main mechanic, four jackpots sit across the top of the reels, and there’s a healthy batch of free spins alongside them. Look a bit closer, though, and the contrasts are significant, leaving Adventures of Doubloon Island feeling like a notably different release.

The first difference is the theme, which is subjective, but it was harder to settle in and get absorbed by Adventures of Doubloon Island than it was with Assassin Moon. The market is packed with pirate-themed slots, so the hook doesn’t land as strongly even with the game’s good looks. That means Doubloon Island has to do more to stand out, and it doesn’t quite manage it. Stronger numbers might have helped, but the stats have been pulled back compared to Assassin Moon. The massive full-screen wild payouts are no longer here, and even the jackpots are reduced. Put together, it results in a game that’s simply less enticing overall.

If you’re not into sailing the seven seas, looting merchant vessels, or storming settlements, there’s little reason to give Adventures of Doubloon Island a go. And even if the ‘arr me hearties’ novelty works at first, the lower ceiling means there isn’t much left to keep you playing for long.