Atlantean Gigarise

by Yggdrasil

Atlantean Gigarise is a mythical-themed slot developed by Yggdrasil that introduces players to a brand new game mechanic known as Rising Reels. Rising Reels sees the size of each reel grow by +1 symbol every time a special Trident symbol lands. In addition to this players can trigger up to 80 free spins AND a bonus feature could see them win one of five progressive jackpots.

Slot information

RTP: 96.00%
Volatility: Low-Medium
Max Payout: 4,370x stake
Reels: 5
Paylines: 32,768
Jackpot: No
Min Bet: 0.20
Max Bet: 40.00
Theme: Mythical
Release Date: 22nd Apr 2021

Our rating

3.8 out of 5

Win potential

Play Atlantean Gigarise

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Atlantean Gigarise Screenshots

Atlantean Gigarise Features

Rising Reels

If a Trident symbol lands on the game reels at any time then the height of that reel will grow by +1 symbol, up to a maximum of 8 symbols in total. When players land a Trident Symbol on a maximum height reel the Bonus Game will trigger and the reel resets back to its original height.

Bonus Game

There are 3 versions of the Bonus Game that players can trigger, these are the Bronze, Silver and Gold Bonus Features. Which version players receive is completely random. 

Players are taken to a new reel set where a single horizontal one payline reel is highlighted. Players have 3 lives and whenever no symbols land on the horizontal reel then their lives go down by one. If players land any of the below symbols then the counter resets back to 3. 

The jackpots that players can win are as follows:

Free Spins

Free Spins can be triggered when players land 3 or more free spin scatter symbols anywhere on the game reels. The more free spins symbols players land, the more free spins players receive. All free spins start at the height of 3 symbols. 

The breakdown of free spin bonuses during base gameplay can be found below:

The breakdown of free spin bonuses during the free spins feature can be found below:

Atlantean Gigarise - Rising Reels

Rising Reels

Whenever a Trident symbol lands on the game reels during base gameplay the reel will grow by +1 symbol. The reels can grow to a total of 8 symbols high.

Atlantean Gigarise - Bonus Game

Bonus Game

When a reel grows to 8 symbols high and a trident symbol lands on it then the Bonus Game is triggered that sees players receive 3 respins on a special 1 payline horizontal reel.

Atlantean Gigarise - Free Spins

Free Spins

If players land 3 or more scatter symbols on the game reels during base gameplay they can win up to a total of 80 free spins. Players can win additional free spins by landing 2 or more symbols during the feature. 

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Atlantean Gigarise Review

Atlantean Gigarise is a mythical-themed slot that's all about expanding reels (known as Gigarise reels). The game starts with 243 ways to win and can expand up to a total of 32,768 ways to win if all of the reels expand high enough! In addition to the Gigarise reels, this slot features a bonus game, free spins feature and no fewer than five jackpots!


This slot, as you would expect is set deep under the ocean in the lost city of Atlantis. Fish swim by the ancient ruins of this once grand city. The reels themselves are set into the ruins of an ancient temple which is flanked on either side by grand Doric columns.

Low paying symbols in this slot are your standard 10, J, Q, K, A whilst high paying symbols are all items associated with Atlantis and ancient Greece... These include a sunken pot, a harp, a sword and shield, a warriors helmet and a gem-encrusted broach. The game's wild symbol is an ionic column with the word WILD underneath it. The scatter symbol is an oyster with a shining pearl sat within it.


Upon first playing this slot each reel is set at the following heights... 3 symbols on reel 1, 4 symbols on reel 2, 6 symbols on reel 3 and 3 symbols on reel 4... Every time a Trident symbol lands on the game reels that specific reel will grow by one symbol (up to a maximum of 8 symbols). The reel sizes will not reset between spins and if players manage to fully grow a reel to 8 symbols and then land a Trident symbol on it then they'll trigger a bonus game and that reel is reset to 3 symbols.

If players change their stake at any time during gameplay then the reels will reset to reflect that stake size, however, if you go back to one of the previous stake sizes then the reels will revert to whatever size they'd reached before.

In terms of navigating the slot, there's an action bar that features coin value buttons, a max bet button, spin and autospin. If players press the blue + button on the far left-hand side of the game screen then they'll open an expanding menu that features the paytable, game settings, game rules and sound settings.

Win Potential

This low/medium volatility slot has an RTP of 96% and a maximum win of 4,370x the player's stake, which is alright but all-in-all nothing groundbreaking. Base game symbol values are quite low, most big wins will come by way of the free spin feature. However, the biggest wins will come during the bonus game when players can trigger one of different jackpots.

Our Verdict

Atlantean Gigarise is an interesting game, the Gigarise mechanic is engaging and we thoroughly enjoyed trying to increase the size of the reels in an attempt to unlock all 32,768 ways to win. The free spins were generous and the bonus game/progressive jackpots are just far too good to miss out on. Don't pass on this slot if you're after something truly different.

Sam Gascoyne
Reviewed by Sam Gascoyne Last updated on

A keen sports bettor, Sam took his first foray into the world of online slots when Bonanza Megaways caught his eye, he’s never looked back since! He joined the team in 2019 and has developed an encyclopedic knowledge of online slots, he isn’t afraid to voice his honest opinion when reviewing new games, even if it does ruffle a few feathers.

Learn more about Sam here

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