Azteca Slot by Playtech

Two symbols carry the features here, and they trigger on completely opposite rules. The female explorer is a scatter, so three or more of her anywhere across the reels award 12 free games with every win paid triple. It retriggers, so another cluster of scatters mid-round drops you back to a full 12. The golden idol mask works the other way. It only counts along a payline, and you need three or more landing on one of the 20 lines to crack open the Hidden Chamber.

That bonus is a second-screen pick round. A collapsing stone chamber fills with golden statues, and you keep choosing them for cash until a Collect or a Pyramid symbol shows up and ends the round. No wheel, no multiplier ladder, no map to navigate. You just pick until it stops, which is about as classic as a Playtech bonus gets.

The pyramid is both the wild and the top payer. It substitutes for everything except the two feature symbols, and five on a line is the single biggest hit in the game at 10,000 coins. Every win also offers the old card gamble, red or black on a face-down card, if you'd rather push a small one than bank it. No buy button, no ante bet, no jackpot. This one predates all of that.

It looks its age, and that's part of the charm. Carved stone tablets hold the reels, jungle leaves crowd the top under a gold hieroglyph AZTECA logo, and the low symbols are card royals chiselled into rock with coloured Aztec glyphs. The richer pays sit in gold medallions: a leather backpack, a red-and-white seaplane banking over a sunset, a purple spider monkey. An Indiana-Jones treasure hunt, stone-and-parchment buttons and all.