Big Bang Boom

NetEnt presents: Big Bang Boom

Explosive excitement waits for you in NetEnt’s Big Bang Boom as neon-esque graffiti symbols come to life on the screen.

Starting with a gaming grid of 4 reels and 4 rows, symbol matches and dropping bombs blow up the background to open new positions. Unlocking all 10 rows—3 atop and 3 below— takes you to Free Spins, where you can further expand the playing area by 2-2 reels on each side. As you extend the gaming grid, your bet ways grow from 256 to a maximum of 10,000. In Free Spins, uncovering Treasure Prizes triggers extra bonuses, such as additional Free Spins and up to 64x multipliers.

Ignite the fuse to reach and have a bombastic time in the colourful world of NetEnt’s Big Bang Boom.

Expanding Reels Feature

Every spin starts with a 4-reel, 4-row gaming grid. When symbol matches occur around the edges of the gaming grid or bombs explode, you can expand the grid. This way, you can add 3 rows to both the top and bottom of the gaming grid during the main game. When you unlock all 10 rows, you progress to the bonus game for 6 Free Spins. In Free Spins, the Expanding Reels Feature lets you add 2 reels to the left and right sides of the gaming grid, up to 8 reels.

Super Bombs Feature

Vertical Bombs, Horizontal Bombs, Diagonal Bombs, and Plus-pattern Bombs may land on the reels during the main game and Free Spins. Persistent Bombs may only appear in Free Spins. Omni-directional Bombs and Cluster Bombs may explode in the main game, during Free Spins, and in the Treasure Prize Feature. Bombs explode after the bet way wins pay out and before an Avalanche™.

Types of Bombs

Vertical Bomb – Explodes vertically to remove adjacent symbols to the top and bottom of its position.
Horizontal Bomb – Explodes horizontally to remove adjacent symbols to the left and right of its position.
Diagonal Bomb – Explodes diagonally to remove symbols adjacent to the corners from its position.
Plus-pattern Bomb – Explodes like a cross to remove symbols adjacent to its position on the top, bottom, left and right.
Omni-directional Bomb – Explodes along with all symbols adjacent to its position to remove all touching symbols.
Cluster Bomb – During the main game, it randomly explodes 3-5 brick-covered positions. In Free Spins, it explodes 3-5 positions not occupied by other bombs.
Persistent Bomb – Only activates in Free Spins. It 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 gaming grid to 10 rows triggers 6 Free Spins. Here you can expand your reels by 2 on both sides, and only 1x multiplier symbols, and Super Bombs may appear.

Prizes landing on the gaming grid remain there till the end of Free Spins, and prize values are multiplied by up to 2,048x when a bomb explosion covers its position.

Treasure Prize Feature

Vertical Bombs, Horizontal Bombs, Plus-pattern Bombs, Diagonal Bombs, Omni-directional Bombs and Cluster Bombs can all be found as Treasure Prizes when uncovering new positions on the reels in the main game or in Free Spins.

Additional Treasure Prizes may be found in Free Spins:
• The Large Prize comes with a value of 16x, 32x, or 64x of the original wager.
• 1 Extra Free Spin is awarded.

Buy Feature

You can activate Free Spins anytime with the Buy Feature. At 75x of the bet you can get 6 Free Spins; at 150x of the original bet you can get 6 Free Spins with a Persistent Bomb placed randomly on the reels at the start of the Bonus Round.

Reels x Rows

4 x 4, expanding up to 8 x 10

Win Lines

256, up to 10,000

Maximum Win




Release Date

August 09, 2023