Before you head to the battlefield, you'll need to choose the stake that suits your playing style and your budget. The game's coin denomination ranges from $0.01 to $20, while the bet can be anywhere from $0.25 to $500 per spin.

On the reels, which are set against a mountain range covered in snow, you'll find a usual selection of low-value symbols represented by playing cards, as well as warrior symbols such as shields, axes and helmets. Thor's hammer is the highest-paying symbol, with five of a kind on a payline giving a payout worth 20x the triggering stake. You'll also encounter the Wild symbol, which can substitute for all others except for Scatter helping you complete more winning combinations.

The Touch of the Valkyries is the feature that gets activated at random after a losing spin in the main game transforming all warrior symbols into Wilds.

The March of the Valkyries is triggered whenever you fill reels 1 or 5 (or both of them) with stacked Wilds. The reels will then respin, while any Wilds on the reels will move to the opposite end of the reels with each respins.

Any Wild can turn one or more warrior symbols into frozen Wilds, which apply a 2x multiplier to any win. Two Wild Valkyries can double a win when they meet on the middle reel.

There's also the Call of the Valkyries feature, which gets activated when the Bonus symbol lands on the reels 1, 3 and 5. Players will have to pick items to reveal their cash prizes. Revealing a hidden demon means a lost life and if you lose all your lives, you'll end the feature. But, if you manage to reach the gate of Valhalla, you may end up with a staggering win!

This is a medium variance title, with well-balanced payouts and an average return to player (RTP) of 96.29%.

1. Find Call of the Valkyries at any Playtech-powered online casino.
2. Place your wager.
3. Hit the Spin button.
4. Reach the gate of Valhalla.