Masks of Atlantis Slot by RealTime Gaming

The Seaquake multiplier indicator sits in the top-right corner and does most of the heavy lifting here. Every cascade chain nudges it one step along the x1/x2/x3/x5 ladder in base play. No cascade, no climb - the meter resets the moment a spin stops winning, and then you start again from x1. Free spins run the same ladder on a longer leash: x3, x6, x9, x15, with the x15 step waiting on a four-cascade chain during the bonus. The premium masks pay on 20 fixed lines, so a chain that reaches the top multiplier while Athena or Poseidon is repeatedly clearing the grid is where the real numbers come from.

Three shield scatters drop 10 free spins with the enhanced ladder. The scatter pays regardless of line position and can land on any reel, and the round retriggers - three more shields during the bonus award another 10 spins on top. RTG folds in Mystery Stacked Symbols and wild-reel drops during the free games, which turn whole columns into a single matched icon and feed the cascade engine. This is where the x15 ceiling actually comes into play: you need the cascade chain to reach step four inside a single spin, which is rare without a stacked mask covering most of a reel first.

Athena sits at the top of the paytable - a red-and-teal goddess face that pays 2,500 coins for five on a line. Poseidon pays 1,000, Atlas 500, Hydra 200. The lower tier is ring-shaped jade and gold glyphs that pay from 50 coins for three. Five Athenas on a line hitting near the end of a Free Spin cascade chain is the stacking recipe behind the 50,000x max win ceiling.

Visually the game goes full underwater temple. Teal and cyan water fills the backdrop, stone ruins flank the left side of the grid, and a purple octopus tentacle curls in from the right, animated gently behind the reels. The masks themselves are the highlight - chunky, Mayan-inflected carvings in gold, bronze, jade, and purple, each one studded with coloured orbs along the border. Carved gold letters spell the title above the reels. If you want the same underwater Greek-myth register in a different RTG frame, Crystal Waters runs on a simpler engine without the cascade ladder.