HelioPOPolis plays out on a 5x3 reel set with 32,768 ways to win, combining ancient Egyptian imagery with futuristic chrome aesthetics. Using the PopWins mechanic, any winning combination triggers the symbols to pop and split into two, expanding the grid height on every consecutive win during a spin. Low value symbols consist of card ranks from 10 to Ace, while higher paying icons fit the thematic setting.

Triggering the free spins feature allows players to choose between game modes offering either larger 2x2 and 3x3 symbols or guaranteed wilds on every spin, alongside mystery symbols that reveal matching icons. With a high volatility level and a max win potential of 20,000x the bet, the game suits players who prefer high variance gameplay and expanding reel mechanics.