Big Bang Boom by NetEnt is a 4-reel slot with 256 bet ways, a 96.07% RTP and high volatility. In the demo version, players can play for free and see how the grid expands from 4 rows up to 10 during the main game. Reaching the full 10-row layout triggers 6 Free Spins.
The game centres on the Expanding Reels feature and a range of bomb symbols. Vertical, horizontal, diagonal, plus-pattern, omni-directional and cluster bombs can remove symbols in different directions, while avalanche mechanics follow winning combinations. During Free Spins, prizes can remain on the grid and be multiplied up to 2,048x if a bomb covers their position.
Treasure Prize symbols can reveal extra rewards, including additional Free Spins or values of 16x, 32x or 64x the original wager. A Buy Feature is also available to practice before playing for real money, with 75x or 150x bet options for immediate access to the bonus round.