Book of Oil slot
The design of the Book of Oil slot perfectly conveys the scorching nature of the gameplay, although mechanically, the game features a classic set of attributes: Wild + Scatter, paylines, a gamble round to double winnings, and a series of bonus free spins. In the latter, a symbol is randomly assigned the 'expanding' property. This is the main highlight of the Book of Oil slot machine, which gives the FS series special value.
Book of Oil Game Review
| Original Title | Book of Oil |
|---|---|
| Developer | Endorphina |
| Release Date | 23 September 2021 |
| Mechanics | Paylines (10) |
| Volatility | Medium (3/5) |
| Bet Range ($, €, £) | 0.01 – 100.00 |
| Potential | x5000 |
| RTP | 96,05% |
The design of the Book of Oil slot perfectly conveys the scorching nature of the gameplay, although mechanically, the game features a classic set of attributes: Wild + Scatter, paylines, a gamble round to double winnings, and a series of bonus free spins. In the latter, a symbol is randomly assigned the 'expanding' property. This is the main highlight of the Book of Oil slot machine, which gives the FS series special value.
Gamble Game
Another opportunity to win significantly more than a regular successful spin offers is to take an additional risk and try to double your current winnings. This option is found in many slot machines released in the nineties and noughties but is undeservedly ignored in more modern 'one-armed bandits'. The creators of the Book of Oil slot online did not follow the majority and added the Gamble feature:
- If the spin is successful, the player has the option to start a gamble game.
- To start it, press the button with the card image on the left side of the control panel.
- The goal is to 'beat the dealer's face-up card' by choosing any of the four face-down cards.
- If you make the right choice, you can repeat your success by trying to double your winnings again.
As with other slot machines, you can play the Book of Oil slot to double your winnings up to 10 times in a row. At any point, you can choose to stop the round and collect your current cash prize.
Winning combination multipliers
The only special symbol in the game is the Safe-Book with a valve. This acts as both a Wild, substituting for other symbols, and a Scatter, which, when three or more appear anywhere on the grid, triggers a round of 10 free spins. Book of Oil slot machine payout coefficients for a bet of 1 credit:
| Symbol | 2 in a line | 3 in a line | 4 in a line | 5 in a line |
|---|---|---|---|---|
| 10 | - | 0,5 | 2,5 | 10,0 |
| J | ||||
| Q | ||||
| K | - | 0,5 | 4,0 | 15,0 |
| A | ||||
| Money | 0,5 | 3,0 | 10,0 | 75,0 |
| Barrels | ||||
| Derrick | 0,5 | 4,0 | 40,0 | 200,0 |
| Tycoon | 1,0 | 10,0 | 100,0 | 500,0 |
| Book | - | 2,0 | 20,0 | 200,0 |
Book of Oil for real money
By risking real money, the maximum payout from a successful spin can range from x0.5 to x500. The risk round can multiply the prize, but it will be useless if the dealer's face-up card is an Ace. For greater convenience, the slot machine has a function to select the number of paylines, while the bet on each can range from 1 to 35 credits. Separate versions of the Book of Oil slot also allow you to adjust the coin denomination, enabling play for cents while still qualifying for a large cash prize.
Book of Oil demo
The best way to test the slot machine in action, get used to its volatility, and learn its other features is to play the demo game. Demo bets will not bring real winnings, but they will allow you to:
- spin the reels and understand how winnings are calculated;
- observe the payout and its changes over time;
- test the online slot with different settings;
- play a session to gather useful statistics.
It is also an ideal option for newcomers who are encountering a virtual slot machine for the first time and are not ready to risk their own money immediately. The demo is available to all user categories and is not time-limited, so you can test the slot for as long as needed before confidently transitioning to the real 'battle' mode with actual bets.
Book of Oil Max win (maximum win)
The game session, both in demo and real money betting mode, will be forcibly terminated the moment the gambler manages to win x5000 their current bet. This is the 'ceiling' set by the developers for this slot machine; i.e., if playing for real money, the maximum win in Book of Oil can be 350*5000 = 1.75 million credits. Additionally, the provider has set the machine to medium volatility, where the frequency of large and small payouts is approximately equal.
Book of Oil RTP (slot payout percentage)
The slot machine has a standard theoretical return percentage (Return to Player) for a Paylines slot – 96.05%. This indicator is calculated over a large number of spins (more than 1 million); therefore, it does not always reflect the actual payout in relatively short sessions. It also does not account for the probability of payouts in the risk round, allowing you to focus on the potential return without adding Gamble-risk to your strategy.
Play Book of Oil online
It is only safe to play the Book of Oil slot machine if you are using the original licensed version of the slot. This is available on many top gambling platforms in the Russian internet segment:
- Vavada,
- 1Win,
- Mostbet,
- 1xBet,
- Joy Casino,
- Casino X.
When launching the slot machine on other platforms, you should ensure that the online casino has a valid license and officially cooperates with Endorphina. Only in this case will you be able to play with due confidence and receive guarantees that the simulator is set for fair random outcomes.
Technical Support
If any malfunctions occur while playing the Book of Oil demo slot, it is recommended to contact the gaming website's customer support service. All claims regarding any bugs should also be directed to support, which is responsible for the stable functioning of the slot machine. Playing the slot machine for real money is recommended only after a trial demo session, which will help identify any possible shortcomings.
FAQ
Is the Book of Oil slot adapted for smartphones?
Does this game feature Auto and Turbo modes?
What are the differences when playing Book of Oil in demo mode and for real money?
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