Online slot machines are essentially virtual re-creations of the original Las Vegas slot machines.
There are several different types of slots, although their mechanics and rules are practically the same. The game usually involves matching symbols that spin and stop to reveal one or several symbols on the screen. The symbols are usually brightly colored and easily recognizable, such as images of fruits, and simple shapes such as bells, diamonds, or hearts. The main objective of any slot game is to line up various symbols in various combinations on the slot payline.

Variations of the number of paylines and reels lead to the difference between machines, aside from drastic cosmetic differences, which have no impact on the rules of the game. And depending on how many reels and symbols the machine has, the payout table will vary.

This is a good point to distinguish the difference between reel slots and video slots, both of which can be played straight or progressively. Reel slots always have three reels and generally range from one to five paylines (one payline being the most common). Video slots will always have more than one payline (sometimes in excess of forty paylines) and are usually composed of five reels.

The main game screen features reels, paylines, payline buttons and control panel.
Figure 1: Main game screen components

Reels
Party Night video slots have 5 reels with 3 visible objects on each.

Paylines and payline buttons
Party Night slots game features as many as 20 paylines. Paylines are straight or zigzagged lines that cross through one symbol on each reel, along which a winning combination is evaluated. Each of paylines selected is highlighted at the game screen in a particular color.
Figure 2: Party Night slots paylines

Each payline has the corresponding payline button. Payline buttons are used for selecting the paylines to bet on. By clicking the specific payline button marked with the appropriate number a player selects paylines inclusively to the selected one. For example, selecting the payline marked with ‘4’ paylines 1 to 4 are selected inclusively. Paylines selected are highlighted, appearing as lightly colored lines across the reels.

Payouts screen
Once the Paytable button is clicked on the main game screen, the Payouts screen opens. This screen contains the description of such bonus features as: Wild symbol, Scatter symbol and Bonus symbol.
Besides, the Payouts screen itself states the payout table with winning amounts for various symbol combinations. Winning patterns may contain 2 to 5 symbols with various winning amounts awarded.
Figure 3: Payouts screen

Bonus Game screen
Once the Bonus Games button is clicked on the main game screen, the Bonus Game screen opens. This screen lists the bonus game rules.

Placing Bets
Placing a bet in Party Night Slots means:
- selecting the value of one coin
- selecting the number of lines to bet on
- selecting the number of coins wagered per line
A player should place a bet before the reels start spinning.

• The coin value can be selected with the help of the BET button. The default coin values available are 0.01, 0.02, 0.05, 0.10, 0.20, 0.25 and 0.50 and the coin value selected is displayed in the COIN VALUE box. Coin values are configurable parameters and can be changed on the merchant’s request.

• A user can select the coin per line value using the ADD COIN button. The number of coins per line can be 1, 2, 3, 4 and 5. The number selected is displayed in the COINS/LINE box.

• A player can change the number of lines with the help of ADD LINE button at the control panel. The number of lines is ranged from 1 to 20 inclusively. The number selected is displayed in the LINES box.

The two notions are used in the game: line bet and total bet.

The total bet amount is calculated as follows: (Coin Value) x (Number of paylines) x (Number of coins per line). The total bet value is displayed in the Total bet box.

The line bet equals (Number of coins) x (Coin value).

The figure below displays the situation when a player has selected 0.10 as the value of one coin (COIN VALUE), 5 coins per line (COINS/LINE) to bet and 5 paylines to bet on (LINES). The TOTAL BET box displays 2.50, correspondingly. All the buttons at the game control panel are enabled.

Figure 4: Bets are placed

A bet can be placed using the BET MAX button that allows selecting the maximum number of paylines and maximum Coins per line value. Once the BET MAX button is clicked the reels start spinning automatically – without clicking the Spin button.

Spin and Spin Results
When the Spin button is clicked, the reels start spinning. All the control buttons are disabled.

After some time spinning reels start slowing down and then are stopped fully one by one. When the reels are stopped, lines are evaluated for the winning combination.

Loss
After the reels stop spinning and there is no winning combination formed along one of the paylines, all the buttons at the control panel become activated and a player can place a bet again.

Win
In case there is at least one winning combination formed along one of the selected paylines after the reels stop, this payline starts blinking, being highlighted and marked with the corresponding color. The amount won along this very payline is displayed on the payline button. The winning pattern is framed and animated. The information line contains the message with the winning amount. While the winning payline blinks, all the buttons at the game control panel are enabled.

Figure 5: Winning combination formed

In case more than 1 payline wins, the winning paylines are animated in turn. Each winning payline blinks twice. Note that same symbols may belong to the various paylines and thus are evaluated and paid separately.

Switching to the Payout screen shows the winning symbols and winning amount(s) highlighted and blinking.
Figure 6: Winning combination is highlighted on the Payouts screen

Winnings Amount Calculation
All symbols pay left to right on consecutive reels of an active payline. All wins are multiplied by the line bet.

The winning amount is calculated as follows:

(Payout listed in the table) x (Line bet) =
(Payout listed in the table) x (Coin Value x Number of coins per line)

Let’s take an example. For the winning pattern formed in the figure below 10 coins are paid. The coin value is 0.10, 5 coins are wagered per line. Thus, the win equals (10 x 0.10 x 5) = 5. The win amount is displayed in the information line.

In case there are winning combinations formed on more than one payline, the winnings of all paylines are summed up. The information line displays the total winning amount.

PARTY NIGHT SLOTS FEATURES

Party Night Video Slots game provides the following bonus features:
• Wild Symbol that substitutes for any symbol except for Bonus and Scatter ones;
• MEGAWILD feature;
• Bonus Game initiated after a certain combination of Bonus symbols is formed;
• Free Spins granted to a player in case a certain combination of Scatter symbols is formed
• Auto Spin option

Wild Symbol
Party Night Wild symbol substitutes for any symbol, except for Scatter and Bonus symbols. It does not pay anything by itself.

Figure 7: The Wild Symbol

The figure below displays the situation when the Wild symbol has substituted the “girl” symbol so the winning combination has been formed and Payline 2 has won. Payline 2 is marked with yellow color.
According to the rules, three such symbols pay 7 coins. The winning amount is calculated as follows: the number of coins in the payout table is multiplied by the line bet. So, 0.1 x 7 = 0.70

MEGAWILD feature
Wild symbol that appears anywhere on the 2nd or on the 4th reel triggers MEGAWILD feature.
MEGAWILD means that all the symbols on the 2nd (in the first case) or on the 4th (in the second case) reel become wild, thus increasing the player’s chances to win.

In the figure below the following situation is displayed: a player has placed a bet on 20 paylines with the coin value of 0.1 and 5 coins per line. As a result of MEGAWILD feature initiated (the wild symbol has appeared on the second reel), all the symbols along the 2nd payline become wild. Winning combinations have been formed along sixteen active paylines! The total win amount equals 57.50.

Scatter symbol and Free spins option
Three or more Scatter symbols anywhere on the reels trigger free spins for a player. 3 Scatter symbols bring a player 3 free spins, 4 Scatter symbols – 5 free spins, 5 Scatter symbols – 10 free spins.

Figure 8: The Scatter symbol

To attract the player’s attention the combination of 3, 4, or 5 Scatter symbols formed is animated (blinks twice).
If one of the mentioned combinations is formed anywhere on the reels, then the reels start spinning automatically without clicking the Spin button by a player.

While the reels spin, the message in the information line displays the number of spins granted to the player and with each spin used – number of the spins left.

Besides, 2 and more Scatter symbols that appear along the active payline(s) pay out to the player according to the payout table.

Bonus Game
3 or more bonus symbols on any active payline trigger ‘Party Night’ bonus game. This game includes 5 rounds; the aim of each is to earn as many bonus points as possible. During each round a player is offered 5 items for selection. All 5 items differ in the number of points granted. Once the item is selected, bonus points granted for this very item are displayed. Bonus game result is a sum of all bonus points earned during 5 rounds.

Note: In case 3 or more bonus symbols appear on more than 1 active payline, bonus points offered to the player while choosing items are multiplied by the number of paylines that have won. Bonus points granted for each item are directly proportional to the number of winning paylines.

B = a*x

Where x – number of winning paylines, a – specified payout granted for the item, B – actual bonus points granted to the player.

Situation 1: 3 bonus symbols appear on the 9th winning payline, the player is offered 5 items for selection; their values are 1, 5, 10, 15 and 20.
Situation 2: 3 bonus symbols appear on the 9th and 10th active paylines, the player is offered items for selection, which values are 2, 10, 20, 30 and 40, correspondingly.

Figure 9: Bonus symbol

Figure 10: End-game screen

Clicking the Back to Game button returns a player to the main game screen.

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