Chunks of intergalactic rock can pay big dividends in Robotnik, a highly entertaining 5 reel, 40 payline space-themed slot from developer Yggdrasil Gaming. This futuristic looking offering comes with wilds, re-spins and multiplier wilds that can triple your wins. Look out for Robotnik himself as the 3D droid can deliver even more wilds. Blast off from between 40p and £20 per spin.

Robotnik is a treat for both the eyes and ears. The reels are filled with 10 different types of space rock which float onto the screen. The brightly coloured gemstone symbols are the biggest payers, offering payouts of between 20 and 500 coins. The reels are set against a space backdrop, complete with a ringed planet and assorted space dust. The images are all extremely sharp and crystal clear against the dark backdrop.

Complementing the on-screen action is a fantastic soundtrack. It’s a pared down version of Strauss’ On the Beautiful Blue Danube which will be familiar to anyone who has seen the classic sci-fi movie 2001: A Space Odyssey.

As far as features go, there aren’t that many but the ones on show do pack a punch. The game is all about the wilds. The purple orb substitutes for all other symbols. Every time it appears you will be awarded with a re-spin with the wild remaining in place.

The re-spins continue until you have a spin where no new wilds appear. The pink wild is even better as it also comes with a 3x multiplier, trebling every winning payline in which it appears.

Keep an eye out for Robotnik himself – when this little droid flies onto the screen he’ll turn a random selection of symbols into wilds and multiplier wilds which can provide a nice little boost. You’ll also receive the re-spins which will continue until no more wilds hit.

The variance in Robotnik is high so some caution is advised. Get on a roll with the wilds and re-spins and the wins can soon start to rocket. And with jackpots of up to 60,000 coins on offer the payouts can have you seeing stars. If you like space-themed slots, Star Trek Red Alert by WMS is very good as to is Space Wars by Net Entertainment.