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Game Basics

• Big Bang Boom is a 4-reel, 4-row video slot with the Expanding Reels, the Avalanche™ feature, the Super Bombs feature, the Treasure Prize feature, and Free Spins.
• The game is played from 256 to 10 000 bet ways in the main game and different bet values. Matching symbols in any position on three or more adjacent reels, starting from the leftmost reel to the rightmost reel, results in a bet way win. More bet way wins are created when additional instances of the symbol appear on the same reels that create the longest bet way win. Only the longest matching combination per symbol is paid. Simultaneous wins on different bet ways are added.
• A bet way win is equal to the value shown in the Paytable. Symbol payout values shown in the Paytable are dynamic and change in accordance with the selected bet value.

Bet Ways Calculation Example

• The longest winning combination of Crown symbols is 4 symbols on reels 1-4. The number of winning bet ways is calculated by multiplying the number of Crown symbols on each of these reels: 3 x 2 x 1 x 2 = 12 winning bet ways.

Expanding Reels Feature

• In the main game, each spin starts with a play area of 4 reels and 4 rows. In the Expanding Reels feature, three additional rows at the top and three additional rows at the bottom of the play area can be uncovered, expanding the main game to 4 reels and 10 rows.
• Free Spins starts with 4 reels and 10 rows. The Expanding Reels feature adds two reels to the left and two to the right of the play area that can be uncovered, expanding Free Spins to 8 reels and 10 rows.
• A position is uncovered when a symbol that is vertically adjacent to it becomes a part of a winning combination or when a bomb explodes and the explosion directly affects a covered position.

Avalanche Feature

• A bet way win or a bomb exploding starts an Avalanche. Symbols that are in winning combinations or part of the explosion disappear, leaving space for a new Avalanche of symbols. The Avalanches continue until there are no more wins or bombs on the reels. If there is any number of winning combinations and bombs on the reels at the same time, the Avalanche happens after the symbols in winning combinations disappear and the bombs explode.

Super Bombs Feature

• Super Bombs feature has 7 types of Bomb: Vertical Bomb, Horizontal Bomb, Plus-pattern bomb, Diagonal Bomb, Omni-directional Bomb, Cluster Bomb, and Persistent Bomb.
• Vertical Bomb, Horizontal Bomb, Diagonal Bomb, and Plus-pattern Bomb can appear during the spins in the main game and in Free Spins, while Persistent Bomb can appear during the spins in Free Spins. Omni-directional Bomb and Cluster Bomb can appear in the Treasure Prize feature in the main game and in Free Spins.
• Bombs explode after the wins are evaluated and cause Avalanches.

Types of Bombs

Bomb	Function
Vertical Bomb	Explodes in a vertical direction, removing adjacent symbols to the top and bottom of its position.
Horizontal Bomb	Explodes in a horizontal direction, removing adjacent symbols to the left and right of its position.
Diagonal Bomb	Explodes in a diagonal direction, removing symbols adjacent to the corners from its position.
Plus-pattern Bomb	Explodes in a cross-shaped direction, removing symbols adjacent to its position on the top, bottom, left and right.
Omni-directional Bomb	Explodes along with all symbols adjacent to its position.
Cluster Bomb	In the main game, randomly uncovers 3 to 5 covered positions. In Free Spins, explodes 3 to 5 random positions that are not occupied by any other bombs.
Persistent Bomb	Can only appear in Free Spins, explodes along with all symbols adjacent to its position and persists on the reels to explode again once on each following spin until Free Spins end.

Free Spins

• Expanding the play area to 4 reels and 10 rows in the main game activates 6 Free Spins. In Free Spins, only Prizes with a value of x1, Vertical Bombs, Horizontal Bombs, Plus-pattern bombs, Diagonal Bombs and Persistent Bombs can appear on the reels during the spins. In addition, Prizes with larger values, different types of bombs, and additional Free Spins can appear in Free Spins in the Treasure Prize feature.
• Prizes that land on the reels stay until the end of Free Spins. The Prize value is multiplied by 2 up to a maximum of x2048 when a bomb explosion covers a position that has a Prize. At the end of Free Spins, a win equal to the sum of all values of Prizes multiplied by the bet value is awarded.
• Free Spins are played at the same bet as the round that activated Free Spins. At the end of Free Spins, the total win from Free Spins is added to any wins from the round that activated Free Spins, and the game returns to the round that activated Free Spins.

Treasure Prize Feature

• Treasure Prizes can be found when new positions are uncovered on the reels in the main game or in Free Spins.
• The following Treasure Prizes can be found in the main game and in Free Spins: Vertical Bomb, Horizontal Bomb, Plus-pattern Bomb, Diagonal Bomb, Omni-directional Bomb, and Cluster Bomb.
• The following Treasure Prizes can be found only in Free Spins:
  • Large Prize: A Prize with a value of 16, 32, or 64 times the bet.
  • Extra Free Spin: 1 additional Free Spin.

Return to Player

• The theoretical return to player for this game is 94.08%.

Betting

• To play the game, you must have sufficient funds to cover your bet. You can see your current BALANCE on your screen.
• To start playing, first select the bet value. Click/tap the plus or minus buttons to increase or reduce the bet or click/tap on the bet value in the middle and select a bet value from a scrollable list. Please note that the selected bet will be applied to each spin. If your balance becomes insufficient to play, your bet will be automatically reduced to the highest available bet value.
• Once you have chosen the bet, click/tap the SPIN button to start playing.
• The indicator around the SPIN button shows how much time is left until you can start a new spin.

Other Controls

BUTTON	FUNCTION
	Click/tap the PAYTABLE button to view the winning combinations and payouts.
	Click/tap the SOUND button to turn the game sounds on or off. Alternatively, use the slider to adjust the volume of game sounds. The button and/or the slider might not be available on some devices.
	Click/tap the SETTINGS button to open a menu of user-changeable settings: All sounds: Turns the game sounds on or off. You can also use the slider to adjust the volume of game sounds, if it is available on your device. Game effects and Music: Turn the game effects or music on or off. Alternatively, use the sliders to adjust the volume. Intro screen: Turns the intro screen on or off. Spacebar to spin: Enables/disables the option to start a spin using the spacebar.
	Click/tap the GAME HISTORY button to view the game rounds you have played and the results of those rounds.
	Click/tap the HOW TO PLAY button to view the game rules.
	Click/tap the FULL SCREEN button to enter the full screen mode or click/tap the EXIT FULL SCREEN button to exit it.

Unfinished Game Rounds

• Any unfinished game rounds are resolved automatically after a period of inactivity.
• In the event of malfunction of the gaming hardware/software, all affected game bets are rendered void and all affected bets are refunded.

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*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.