Astros

Astros by Red Tiger is a video slot with a pyramid-shaped grid instead of traditional reels and paylines. You start on the bottom row of the pyramid, which has seven symbol positions; when you land at least three matching symbols there, they become “active,” you earn a cash prize and unlock the next level. Each subsequent level (there are five in total) has fewer positions, and levels 2-5 carry multipliers (2×, 5×, 10×, and 50× respectively) that boost wins from active symbols on those rows. There is a Wild symbol that substitutes for all cash prize symbols except the Bonus scatter, and the Bonus scatter appears on level 3. Landing at least one Bonus scatter on level 3 triggers the Seven Prizes Bonus feature: seven positions display random stake multipliers (from 1× up to 100×) and the total of what’s revealed is awarded, multiplied by the number of scatter symbols that triggered it. If you manage to reach the fifth level with three matching active symbols there, you unlock the instant top prize of 5,000× the stake, in addition to whatever wins you’ve accumulated on lower levels. There is no free spins feature as you might expect; the bonus round is the Seven Prizes Bonus rather than a conventional free spins mode. The game supports a range of small to moderate bets depending on the casino, and because of the level progression mechanic, each spin can build up tension as you try to climb higher on the pyramid toward the maximum win potential.

You can play it for real money.