Book of Oil by Endorphina

ENDORPHINA has expanded its portfolio with the launch of its latest slot release, Book of Oil.

In the game, players can look forward to diving into a world where oil rivers shimmer like gold under the sun.

Book of Oil is designed to bring players into a world filled with endless wealth from classy Oil Tycoons. Within this slot, players will find 10 lines, 5 reels and 3 rows, bridging timeless mechanics with black-and-gold perfection.

In addition, a Bonus Pop feature is available. Surrounded by all the golden beacons, this mighty treasure shines so bright, that all the stars become dim. The Book symbol acts as Scatter and Wild.

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.