Power Zones: Legend of Hydra™

Power Zones: Legend of Hydra™ from Playtech is a video slot with 6 reels and 5 rows, offering 15,625 ways to win, inspired by a mythological Greek theme where heroes battle the multi-headed Hydra. The game includes a Wild symbol (a golden crown) that can substitute for other symbols except for Bonus (Scatter) symbols. A unique mechanic in the game is Power Zones™: these are symbol positions (except Wilds and Scatters) that lock in place, connect horizontally or vertically, expand when new Power Zone symbols land, and when a charged symbol lands within, all symbols in the Power Zone transform into a matching symbol type.

There are four Hydra Features that unlock in sequence when you fill a meter above the reels by collecting charged symbols in Power Zones™. Once unlocked, these features can trigger randomly on any spin. The first adds up to 11 Wilds on reels 2-6; the second introduces up to 9 additional Power Zones; the third adds up to 4 multiplier Power Zones with a fixed 2× multiplier; the fourth adds some extra Power Zones and transforms all current Power Zones into Mystery Symbols.

When three or more Bonus (Scatter) symbols land anywhere on the reels, the Mighty Hydra Free Games mode is activated. Depending on how many Bonus symbols appear (3, 4, 5, or 6), the game awards 12, 18, 25, or 50 free spins, respectively. During free spins, Power Zones remain in place and cannot be removed. Bonus spins can be re-triggered infinitely by landing bonus symbols during the feature.

When the free spins end, a Mega Spin is activated: all Power Zones transform into the same Mystery symbol to create a final opportunity for significant rewards. The gaming experience has high volatility, with most of the excitement stemming from how Power Zones accumulate, transform, and combine with the locked Hydra Features to enhance potential outcomes.

You can play it for real money.