As the name implies, this game has lightning in it. Specifically, we're talking the kind of lightning the comes from a giant Norse hammer.

Yes, this is a game about Thor, and we're not talking about the wimpy Thor in skintight spandex and a soft fur cape from Marvel comics either. This is proper Thor - helmet wearing, burly, bearded Thor with a giant hammer ready to smite fools left and right.

But I'm getting ahead of myself.

At its core, this is a five reel slots game from Microgaming, one of the best and most prolific developers in the industry. By today's standards it has a relatively conservative nine pay lines, which can obviously be activated at will when you feel like it.

It takes coins from pennies up to $0.50 pieces, and its max coin limit is set at 90 coins. It the jackpot, and you're looking at a return (assuming no multipliers in play) of 6,000 coins.

As has been discussed, the theme of this game is very definitely Norse. The images we're looking at show Thor's war horn, his mighty hammerhead, the sturdy hammer haft, bolts of lightning and what appears to be Valhalla itself.

Naturally, Thor himself is both the Wild symbol and a multiplier. Use him to complete any winning pay line, which his presence will automatically double.

The only symbol Thor can't substitute for is the scatter symbol, represented here by a pair of slightly sinister looking rams. Two ram symbols nets you an instant win, while three or more ram symbols gets you 15 free spins of the reels.

Any time you win, the bonus game is activated. It's as simple gambling game in which you must predict the colour or suit of a hidden card. Correctly guessing its colour doubles your win, and giving its suit right quadruples it. Of course, get it wrong and you lose everything, which is why the bonus game isn't mandatory - you can opt out of it.

Like most Microgaming titles, I had fun playing this game.