Book of Oil by Endorphina. Become an Oil Tycoon

Feel as if you're a classy Oil Tycoon in our brand new game #BookofOil. It's time to turn that oil crane on and get filthy rich unlike ever before.
Experience the thrill of slot machine game that is a 10-line, 5-reel and 3-row one that bridges timeless mechanics with black-and-gold perfection.
Surrounded by all the golden beacons, this mighty treasure shines so brightly, that the stars become dim. The Book symbol acts as a Scatter and Wild, revealing the craziest wins of all time.
When three Scatters land on the reels, they trigger 10 Free Games with an expanding symbol. At the beginning of the feature, a special symbol is randomly selected. During the Free Games, the Wild cannot substitute for the special symbol.
Special symbols expand after the payout of regular symbols. The expanding symbol pays for combinations of a kind in adjacent and non-adjacent positions, and only on enabled paylines. Free Games can be won again during the feature.

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https://endorphina.com/games/book-of-oil

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