Curious what 123 Boom! actually feels like to play? Here's our full, no-fluff take. 4ThePlayer are the developer behind it, tuning the slot game for very high volatility, with 96.4% RTP. Dating back to 2016, it remains a regular pick. Visually it's built around a pirate theme, with the action running on 15 paylines across 5 reels. The maximum win sits at 736,350x, so there's serious upside on the table. The full verdict is below.
Written by James Holloway · Last updated: January 2026
123 Boom! is a slot from 4ThePlayer. Presentation-wise it's themed around pirate, and it leans toward a very high-variance maths model at 96.4% RTP. Under the hood you'll find a 5-reel grid running 15 paylines.
Dig into the bonuses and 123 Boom! starts to stand out. Look out for scatter symbols that unlock free spins and extra bonus rounds. The very high volatility means patience is rewarded — expect quiet spells broken by bigger hits. Overall it's a well-rounded slot that knows what it is.
The RTP of 96.4% is right around the industry average of ~96%. This represents a fair return that's in line with what most modern slots offer.
Very high volatility delivers the most extreme payout profile — long dry spells punctuated by potentially massive wins. Only recommended for experienced players with substantial bankrolls and high risk tolerance.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
123 Boom! features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.1 / 5 — Good
123 Boom! by 4ThePlayer is a solid offering that delivers good entertainment value. The 96.4% RTP combined with very high volatility creates a well-balanced gaming experience.