Argonauts Slot by Endorphina

Two separate bonuses run here and they have nothing to do with each other, so it's worth keeping them straight from the start. The white dove is the scatter, and three of them anywhere hand you 8 free games. The twist is the reel set during those spins: every low symbol gets pulled out, leaving only the top-paying heroes and relics plus the wild, scatter and bonus symbols. Thinner reels mean each hit lands harder, and the round retriggers if more doves drop, played at the bet that triggered it.

The bigger draw is the Golden Fleece round, a hold-and-win built around the bonus symbols rather than the doves. You need 6 or more of them on a single spin to start it. The grid flips to a 5x3 board of spinning Greek meander tiles, and the bonus symbols you triggered with lock in carrying their values. You begin with 3 attempts. Each spin burns one, but any new bonus symbol landing snaps the counter back to 3, so a board that keeps feeding symbols can run far longer than three spins. Jason's Shield tiles hold cash prizes from x1 up to x16 of total bet. The Golden Fleece tiles are the prize ones: each guarantees a hidden jackpot revealed at the end, either 20x, 50x or 150x. The round ends when attempts run out or every cell is covered, and everything on the board pays at once.

Filling all 15 positions with bonus symbols is the chase. Do it and the ULTRA jackpot pays 5,000x total bet, which is also the game's ceiling. Clearing a full board that resets to 3 attempts every time a symbol lands is rare, and most rounds end somewhere short with a scatter of shield values and one fleece jackpot, but that full-grid result is the number the whole bonus is built toward.

The wild is the Golden Fleece itself, a golden ram, and it only lands on the three middle reels, where it shows up stacked and can fill a column in one drop. It covers everything except the dove and the bonus symbols. The board sits over a sunlit Mediterranean coast, green cliffs and a winding river running back to distant mountains under a clear sky, with richly painted symbols up front: a helmeted, bearded Jason, the dark-haired sorceress Medea, a snarling green dragon, the Argo galley, a recurve bow, an ornate goblet, a green potion vial and a golden lyre. Gold coins stamped with cash values drift through the base game too. Any win can be sent to a four-card gamble, beat the dealer to double, up to ten times, though jackpot wins can't be risked.

Separate from all of the in-bonus prizes sits a network Mystery Jackpot with Grand, Major and Minor tiers, drawn at random with no input from you and weighted toward higher bets. Operators can switch it off, so whether it's live at all depends on where you play.