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There some online slots with very unusual themes and Oil Mania is definitely one of them. Oil Mania is an online slot created by NextGen Gaming. It has an original theme, a little bit outdated visuals, and an inventive bonus feature.

Graphics & Theme

The theme of this game is oil drilling. You can see many oil drilling rigs installed on a land that is obviously reached in oil – the black gold. The graphics will probably leave you a little bit disappointed unless you were hoping to see comic book-styled symbols and simple depictions of drilling rigs in the background.

Gameplay

Oil Mania has 5 reels and 25 adjustable paylines. Players can easily spot the classic playing card symbols on the reels, but there are few other basic symbols related to the theme – a profit prediction, a suitcase packed with cash, a luxurious gold car and an oil worker.

The oil magnate is the bonus symbol in this slot and the key to the inventive bonus feature. Oddly, there is no wild symbol in this game.

The oil magnate symbol shows up on the second, third and fourth reel. Getting it on all three reels at once will activate a bonus round where you will notice an oil well wild symbol and you will get three free spins. It is possible to re-trigger this bonus mode again. There is a gamble feature in Oil Mania too which you can use whenever you win a turn.