Timber Stacks
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Timber Stacks
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Timber Stacks Slot Review

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How to play Timber Stacks mobile slot

The great outdoors with snow-capped mountains and luscious green plains are the setting for the Pragmatic Play Timber Stacks slot, which comes with a high variance and a high 10,000x bet maximum win.

The Timber Stacks mobile slot is a 5×5 slot which, thanks to its random Expanding Grid feature, can have up to 100,000 ways to win. It features Tumbling Reels, Wilds, a Free Spins bonus and 96.05% RTP, all set on a wilderness theme.

It’s a bright and colourful theme with A – 10 symbols paying the least while the Bears, Salmon, Wolves, COugars and OWls take the highest paying symbol top spots.

It’s not a unique theme, but the features you’ll find inside the Timber Stacks game do provide a new twist on popular slot mechanics.

Increasing Grid up to 10×5 with 100,000 ways to win

The 5×5 grid is what you’ll typically play most of your spins on; however, occasionally, the Increasing Grid feature can trigger adding one or more empty rows to the bottom of the grid.

A random reel is then chosen to fill the row from the point of the reel with its symbols, with more symbols dropping into place to fill all the empty spaces.

These extra rows help change the landscape of the reels, which in turn can help create more winning ways, helping boost your wins throughout the base game and the free spins.

The biggest the Timber Stacks slot can be is 10 rows high with 5 reels, giving you the maximum 100,000 ways to win, something which unfortunately doesn’t happen often in the base game, but all that can change in the free spins.

Win up to 10,000x bet in the Free Spins

You’ll need 4 or 5 free spin scatters to unlock 8 or 10 free spins, which are set on a new set of reels.

Here, the Increasing Grid feature seems to trigger more often, which will see you grow your grid higher and unlock more ways to win, which can pay over 100x your bet at times.

Getting close to the top win, though, feels like a 1 in 14 million chance, with winning over 1000x your bet a 1 in around 192,000.

This means most will experience wins of 20x – 500x your bet more than you will the truly big wins that are hiding within the Timber Stacks.

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Timber Stacks slot stats

Mobile Slot released6th November 2023
Slot typeVideo Slot
SoftwarePragmatic Play
Slot reels / paylines5 Reels / 100,000 Ways to Win
House edge / RTP3.95% / 96.05%
Slot volatilityHigh
Min/Max bet0.20 / 240.00
Max win10,000x Stake
Free spins8 or 10 Free Spins | No Multipliers
Bonus roundsWilds, Ways to Win, Expanding Reels, Free Spins, Bonus Buy, Ante Bet
Slot ThemesAnimals
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In-game bonus features

Wilds: The Wilds symbol appears on reels 2, 3, and 4 only substituting for all other symbols except the Free Spins Scatter.

Free Spins:You'll need 4 or 5 Scatter Symbols to trigger 8 or 10 free spins, respectively. During the free spins, the increasing Grid Size feature appears more often on the special reels.

Tumbling Reels: On a Win, the winning symbols are removed, with the existing symbols falling down and new symbols falling in to fill the empty space.

Ante Bet: For 25% extra on top of your current bet, you can activate the Ante Bet feature, which doubles your chance to win the Free Spins bonus feature.

Bonus Buy: For 120x your current bet, you can trigger the free spins where 4 or 5 scatters will randomly land, triggering 8 or 10 free spins.


  • High 10,000x bet maximum win
  • High 96.05% RTP
  • Random Expanding Grid Size


  • RTP can be as low as 94.05% at some slot sites

Timber Stacks Review Conclusion

The Timber Stacks slot on mobile is a colourful affair with a good-looking animal wilderness theme.

The Tumbling Reels add more action to your spins with the increasing Grid size feature, adding a few extra wins in the base game.

It's in the Free Spins bonus game where the Increasing Grid size comes into play more regularly, hoping to land bigger wins and capture your attention by increasing the excitement levels.

However, as with most Pragmatic Play slots and probably most slots online, the top win, even though juicy at 10,000x, your bet is out of reach for most, with smaller wins more common.

Overall, it is a fun, good-looking slot with interesting features that help entertain and create more wins at any good Pragmatic Play casinos.

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Review by Lucky Mobile Slots, last updated: November 8, 2023 - Rating 3

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