A quartet of heroic zombie hunters try and hold back an invasion of the living dead in Attack of the Zombies, a superbly designed 5 reel, 50 payline slot from Genesis Gaming. Available to play on all devices, this horror-themed game comes with a free spins feature where 4 different symbols can become wild. Play from between 50p and £500 per spin.

The cartoon style imagery in Attack of the Zombies has a steampunk feel. Set against a haunted graveyard backdrop, symbols include 6 different zombies and the 4 female zombie hunters. All the quartet offer payouts of 10 times your stake if you land 5 on a payline. They are joined by a throbbing brain which is the game’s wild, replacing all other symbols apart from the scatter. 3, 4 or 5 wilds award 0.5, 5 or 15 times your total stake.

Where the game comes to life is in the Free Spins feature – to trigger it, you’ll need to land 3, 4 or 5 of the bonus symbol anywhere on the reels on the same spin.

In the feature, the 4 zombie hunters are turned into zombies – when the antidote symbol lands on reel 3, 1 of the quartet will be cured and in the process turn into a wild whenever they land on future free spins. The free spins keep on coming until the antidote has landed 4 times and all the zombie hunters have been cured and turned into wilds. You’ll then be awarded a final spin with 5 wilds in play (the standard brain wild, plus the 4 zombie hunters). If these fall nicely, some mighty payouts are possible.

Attack of the Zombies is a pretty simple slot – the antidote in the free spins round is a nice variation though and offers plenty of potential. Don’t expect to land the feature too often but hope to cash in when you do. We’d put the variance on the high side of medium.

The design here is superb – the high definition visuals are super sharp and the haunting backing track an ideal match for the horror theme. The game engine is super smooth, even when playing in lightning mode.

There are plenty of horror themed slots already doing the rounds in the online casino ether – Attack of the Zombies is a quality addition. Its mix of terrific sound and visuals with an innovative take on a classic feature make it a very playable proposition for horror lovers and non-fans alike. I also recommend Playson’s SpellCraft and Microgaming’s Electric Diva.