Argonauts Slot Review
by EndorphinaReleased Sep 5, 2023
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Argonauts is a Greek-mythology 5x3 slot from Endorphina with two bonus modes: scatter Free Games stripped down to top symbols only, and a Golden Fleece hold-and-win where collecting 15 symbols lands the ULTRA jackpot worth 5,000x.

Specifications
| Game Type | Slots |
|---|---|
| RTP | 96.06% |
| Volatility | High |
| Max Win | 5,000x |
| Grid | 5x3 |
| Paylines | 10 paylines |
| Min Bet | $0.1 |
| Max Bet | $45 |
Argonauts Slot Overview
Argonauts sails the Jason legend onto a small ten-line grid, and nearly everything worth chasing sits inside its Golden Fleece round.
The base game is deliberately old-fashioned. Five reels, three rows, ten fixed lines, stacked bull wilds across the middle three reels, and a white dove that counts from any position. Gold coins keep dropping in with values stamped on them, worth 1x to 16x the total bet, and they pay nothing at all unless six or more land together and open the hold-and-win round. Watching a 16x coin land alone is a normal part of playing this game.
Endorphina built it on the same frame as Joker Ra: Sunrise and Football Mayhem, so the bones are familiar. What it adds on top is a second, entirely separate bonus: three doves award eight free games with every low symbol stripped off the reels.
Theme & Design
The reels hang over a bright Mediterranean coast, green cliffs dropping into a river that widens toward the sea, hazy mountains and fat white clouds behind. This is a daylight Greek setting rather than a thunderstorm one, closer to travel poster than epic, and deep navy panels in a gold frame keep the symbols easy to read against it.
Jason wears a gold helmet with a red horsehair crest on a red disc. Medea stands in white with a wheat-gold crown against violet, and the dragon is a green serpent caught mid-hiss with its forked tongue out. Below them sit black-and-orange kylix cups, a recurve bow with crossed arrows, a green potion in a gold-mounted flask, and a small wooden lyre. The wild is the odd one: not the fleece the story promises but a snorting bronze bull head wreathed in fire, which does at least make it unmissable when it stacks. The painting is clean and the symbols are well drawn, though the backdrop never moves and nothing on the reels will surprise anyone who has played a Greek slot before.
Symbols & Paytable
| Symbol | Payout |
|---|---|
| Jason | top standard symbolline wins pay from the leftmost reel across the 10 fixed lines |
| Medea | second premium |
| Green dragon | third premium |
| Argo ship, kylix cup, bow and arrows, potion flask, lyre | low-tier line symbols |
| White dove Scatter | 3 anywhere award 8 free gamesscatter wins are added to line wins |
| Bull Wild | substitutes every symbol except Scatter and Bonusstacked, reels 2-4 only, in both the base game and free games |
| Jason's Shield Bonus coin | 1x to 10x, 12x, 14x or 16x total betpaid only if the Golden Fleece Bonus Game triggers |
| Golden Fleece Bonus | MIN 20x / MID 50x / MAX 150x total bethides a guaranteed extra prize revealed when the bonus ends |
Features & How They Work
Stacked bull wilds
The flaming bull lands stacked on reels 2, 3 and 4, never on the outer reels, and substitutes for everything except the dove and the bonus coins. On ten lines that placement matters more than it sounds: a full stack in the middle sits on every payline at once, so a single high symbol on reel 1 backed by two stacks turns into a four-of-a-kind spread across the board. It works the same way during free games.
Free Games with high symbols only
Three doves anywhere on the reels award 8 free games, played at the triggering bet. Every low symbol is removed for the round, leaving only Jason, Medea, the dragon, the wild, the dove and the bonus coins, which raises the value of the average hit sharply. The round retriggers on another three doves. Bonus coins still land here, and six or more of them jump straight into the Golden Fleece round.
Golden Fleece Bonus Game
Six or more bonus symbols on one spin turn the grid into a hold-and-win board. The triggering symbols lock in place with their values, the rest of the cells become spinning Greek meanders, and an indicator starts on 3 attempts. Each spin costs one attempt, and any new bonus symbol resets the count back to 3.
Shields carry the cash multipliers of total bet. Golden Fleece symbols carry something extra: a hidden jackpot revealed at the end, either MIN 20x, MID 50x or MAX 150x. The round runs until the attempts are gone or the grid is full, and every value on the board is paid together at the finish. Fill it with 15 bonus symbols and the ULTRA Jackpot of 5,000x total bet lands, which is where the max win figure comes from.
Risk Game
After a paid spin you can gamble the win on a card draw: pick one of four face-down cards and beat the dealer to double, up to ten times in a row. Jokers beat everything and the dealer never draws one, equal cards are a push. The return on the Risk Game averages 84%, so it is a straight trade of expected value for variance. Jackpot wins cannot be gambled, and the option is off during autoplay.
Mystery progressive jackpots
Separate from the fixed bonus tiers, the game can run Endorphina's network GRAND, MAJOR and MINOR progressives. They are drawn at random with no player input, larger bets improve the odds, and operators are free to switch the whole thing off, so plenty of casinos run Argonauts without them.
Screenshots

How Argonauts Plays
Sessions run flat for long stretches. Ten lines on a 5x3 grid gives few chances to catch anything, and the standard symbol wins are modest enough that a string of them barely moves the balance. The coins are what hold attention. They land often, they show a number, and most of the time they spin away again. Whether that grips you or wears you down probably decides how you feel about the whole game.
The free games change the texture more than the length suggests. With the junk symbols gone, eight spins land like twenty, and a middle-reel stack can drag a premium across the lines fast.
The bonus is a different game altogether. Three attempts is tight, one new symbol re-arms it, and the gap between a board that dies on the second respin and one that keeps resetting is enormous. That stop-start rhythm is the best thing here. Fleece hits usually land on the smaller tiers (the kind of thing you either chase or shrug at), and a full board is more of a story you hear about than a target you play toward.
Pros & Cons
Pros
- Golden Fleece hold-and-win has resetting respins and fixed jackpot tiers up to 5,000x
- Free games remove every low symbol, so eight spins hit harder than the count suggests
- Stacked wilds sit on all three middle reels, which covers every payline at once
- Wide bet range from 0.10 up to 45 per spin
Cons
- Six bonus symbols is a demanding trigger and the base game does little while you wait
- Coin values pay nothing unless the bonus round actually starts
- No bonus buy and no ante bet to speed up the wait
- Art is competent but familiar Greek fare, and the backdrop is a static painting
Is Argonauts Worth Playing?
Argonauts is a small game with one big room in it. Base spins mostly exist to load the grid with coins, and the Golden Fleece round is where both the money and the drama live. As hold-and-win designs go this one holds up: the resetting attempts build proper tension, and the fleece tiers give the round a second layer on top of the shield values.
The limits are just as plain. That six-symbol trigger is steep, the free games are over quickly, and with no buy option the wait is the price of entry. A 96.06% return is fair without being generous. It lands as mid-shelf Endorphina: good company when the bonus finally arrives, easy to forget on the spins in between.
Frequently Asked Questions
What is the maximum win in Argonauts?
How do you trigger the free games?
How does the Golden Fleece Bonus Game start?
Is there a bonus buy, and what is the RTP?
Can you play Argonauts for free, and is there an age limit?

Reviewed by Arina, PR & Content Manager
PR & Content Manager at SlotsReach
Published 31 Jul 2026 · Updated 31 Jul 2026