Big Bang Boom

Big Bang Boom from Netent is a video slot with an urban and neon graffiti theme, where the symbol design and background make an impression like a wall with colorful paintings. The game starts on a 4×4 grid, and the goal is to expand both rows and reels through the game's features. There is Avalanche™ mechanics, where winning symbols disappear and new ones fall down, which can create chains of win openings.

A central feature is Expanding Reels: in the main game, you can open up to ten rows by winning symbols at the edges or by triggering bombs, and in the free spins round, the reels can expand to both the left and right side, up to a total of eight reels. There are seven different types of bombs – including vertical, horizontal, plus-pattern, diagonal, cluster, omni-directional, and persistent bombs – all of which have unique patterns for removing symbols or opening new positions.

When you reach the maximum row height in the base game (all ten rows open), the free spins feature is activated with six free spins. During these spare rounds, winning symbols that land become sticky and remain on the grid, and bombs can double the value of all prizes covered by explosions – multipliers of up to 2,048× can be achieved.

There is also a Treasure Prize feature: when new positions are opened either in the main game or in free spins, you can reveal either a larger prize (which can be 16×, 32×, or 64× the bet) or an extra free spin. Finally, there is a Buy Feature, allowing you to purchase access to the free spins feature with options; either regular six free spins or six free spins with a persistent bomb active from the start.

You can play it for real money.