Under attack from alien invasion, the only thing that can save the earth from destruction is a rock chick and her trusty electric guitar. That’s the unlikely theme in Electric Diva, a 5 reel, 40 payline video slot from Mahi Gaming in conjunction with Microgaming. Only available on desktop devices, the chief attraction here is the bonus feature where you can win up to 40 free spins with multipliers of up to 8x. Rock out from between 40p and £50 per spin.

Set against a misty, cityscape backdrop, the reels have a dark and oppressive feel (which is just what you’d expect given the horror/heavy metal theme). Joining the lower value A to 10 playing cards are a scorpion, a bat, the guitar-wielding Electric Diva and her superhero alter ego. Land 5 of the latter for a payout of 50 times your total stake.

The Electric Diva logo is the game’s wild, replacing everything bar the scatter – land 5 of these on a payline for a massive payout of 120 times your total stake.

What you’re really hoping to find are 3 or more of the electric guitars scatters symbol and trigger the Electric Diva Bonus feature. Land 3, 4 or 5 of them and you’ll receive an initial allocation of 1 free spin at 1x, 2 free spins at 2x or 3 free spins at 3x. There’s plenty of scope to add though.

You’ll be taken to a new screen where a horde of alien insects are about to attack Electric City – the Electric Diva will zap them with lightning bolts from here guitar and in the process reveal more free spins and multipliers with up to 40 free spins with a 8x multiplier possible. Keep on zapping aliens until you land the start free spins alien – the accumulated spins are then played out on a new machine where the reels spin up rather than down.

We found Electric Diva to be a medium to high variance video slot – we endured spells that were as seemingly pointless as a 20-minute progressive rock guitar solo. When we did get stuck into the free spins we hit paydirt though, landing 36 free spins with a 6x multiplier and pocketed a payout of almost 250 times our total stake! It was real feast or famine fare so you’ll need a decent bankroll to cope with the potentially massive swings.

When it comes to heavy metal, we’re usually in the “it’s just noise” camp. Electric Diva hasn’t changed our minds about the musical merits of hard rock but with its solid visuals, raucous backing track and a quality bonus feature, it’s an entertaining and extremely playable game. If you like rock-themed video slots, Net Entertainment offer you both Jimi Hendrix and Guns N’ Roses.