Hammerblaze Slot Review

If you've played Thunderkick's Hot Potato: Battleground, which came out in September, the board and the blasts of Hammerblaze (released in May 2026) will look very familiar. It's a mythic forge-themed, 7x7 cluster-pays slot that leans entirely on one big mechanic: exploding wilds that leave doubling multipliers in their wake.

The base game is pretty straightforward, but the real draw is the free spins bonus, triggered by landing three anvils for 10 spins. You can grind it out naturally, switch on one of the two BET+ modes (Bonus Boost, where each spin costs 1.3x your bet and the bonus is twice as likely, or Bonus Boost Plus at 2.2x a spin and five times as likely), or just buy the Bonus Game outright for 100x your stake.

Here's the core gimmick: when a flaming hammer wild explodes, it clears out a block of symbols and leaves behind a grid of x2 multipliers. If another hammer explodes in the same spot later, that multiplier doubles, going all the way up to x128. In the base game, these wipe clean after every spin. In the bonus, they stick around until your free spins run out. Because the game adds up the multipliers of every cell a cluster sits on, a single cluster covering a few of these spots can suddenly pay out big.

Fair warning, though: this game requires patience. Because the bonus relies on building up those multiplier spots over time, it's heavily back-loaded.

I bought the feature for 100x, and about half of my spins were completely dead, leaving the board exactly as it was. It can be frustrating to watch. But by the eighth spin, earlier hammer explosions had finally stacked one cell up to x32. Suddenly, a cheap cluster of dagger symbols turned into a 14x payout simply because of the multipliers sitting underneath it. I ended the round with a 37x total win and a cell sitting at x64 on the final spin. It's a classic very-high-volatility experience: you have to suffer through the quiet stretches to build up any real momentum.

If you're wondering how it compares to other games, the closest match is Hot Potato: Battleground, and Hammerblaze is the barer of the two. They share the same layout and x128 sticky multiplier cap, but Hot Potato has a slightly better RTP (94.23% vs. Hammerblaze's somewhat low 94.13%), feature symbols that react to the blasts, and five BET+ modes against two. Both cap out at a solid 10,000x max win. (It's worth noting that Thunderkick's other cluster games, like Greedy Pumpking (due in October), handle this differently by attaching multipliers to the wilds themselves rather than the grid).

It's also hard not to compare this to Pragmatic Play's Sugar Rush. Both use that doubling-cell mechanic up to x128. Sugar Rush builds its multipliers from winning symbols rather than wilds and offers a much friendlier RTP (96.50%), though Hammerblaze boasts double the max win potential.

Hammerblaze is a solid, straightforward grid slot. It doesn't have a million bells and whistles, and the dead spins in the bonus can feel brutal. However, if you like games where the tension builds toward the final few spins, watching those multipliers double up on the forge is undeniably satisfying.