Best Expanding Grid Slots 2026

Slots where rows or reels unlock during play, increasing the number of ways to win.

We currently list 33 expanding grid slots from 5 studios, led by Nolimit City (14), Thunderkick (8) and Pragmatic Play (6). Across the 33 games with a published RTP, the average is 96.18%. White Rabbit Megaways has the highest at 97.24%, while Carnival Queen 2 is lowest at 94.18%. Max wins range from 1,783x up to 70,000x on Fire in the Hole 3. Of the 26 games with a provider volatility rating, the most common ratings are very high (38%), high (38%) and medium (15%). 16 of them (48%) offer a bonus buy where it is legal.

33 slots match this list. Rankings use our editorial review score and the published game data; they are not paid placements.

1. Fire in the Hole xBomb – Nolimit City

Fire in the Hole xBomb is a mining-themed cascade game where xBomb wilds blow open extra rows. Its Lucky Wagon bonus has sticky multipliers that make late spins the most exciting. It strikes a good balance between Nolimit's extremes and a gameplay loop you can actually follow.

96.06% RTP · Very high volatility · 60,000x max win

2. White Rabbit Megaways – Big Time Gaming

White Rabbit is an Alice in Wonderland-inspired Megaways game with growing reels in the bonus and a 97.24% RTP – one of the highest defaults you'll find in a major-studio slot. The free spins can reach a huge number of ways.

97.24% RTP · High volatility · 17,420x max win

3. Fire in the Hole 3 – Nolimit City

Fire in the Hole 3 returns to the collapsing mine, where rows open from three to six with each collapse. xBomb Wilds clear their neighbours and raise the multiplier, Wild Mining is triggered by lines of three to six matching symbols without a win, and buried features hide in the dirt.

96.05% RTP · Very high volatility · 70,000x max win

4. Misery Mining – Nolimit City

Misery Mining is a 7x7 mining slot where only the central 3x3 area starts open. xBombs exploding next to a barrier push it back one step, gradually opening the grid and raising the multiplier.

96.09% RTP · Very high volatility · 70,000x max win

5. Fire in the Hole 2 – Nolimit City

Fire in the Hole 2 is a 6x6 mining sequel. Each spin starts with three active rows, and every collapse opens another row, up to six. Dirt blocks hide wilds, split symbols or bonus symbols, which only activate once the dirt is cleared.

96.07% RTP · Very high volatility · 65,000x max win