Timber Stacks from Pragmatic Play

RTP: 96.05%

Venture into the wild with Timber Stacks! Spin now and stack up your fortune.

Head into the great outdoors with Timber Stacks, a rugged and innovative casino game from Pragmatic Play. This wildlife-themed slot introduces a unique Increasing Grid Size mechanic, where tumbles can cause reels to grow and add more ways to win. With a free spins round that enhances this powerful feature, this high-volatility mobile slot is a lumberjack’s dream with a massive 10,000x top prize.

Provider: Pragmatic Play
Release Date: 2023
RTP: 96.05%
Volatility: High
Max Win: 10,000x
Theme: Wildlife / Forest / Lumberjack
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Feature Value
Reels 5
Rows 5 (can expand to 10)
Paylines Up to 100,000 Ways to Win
Min Bet €0.20
Max Bet €240
Max Win 10,000x
Jackpot No
RTP 96.05% (Also 95.0%, 94.05% versions)
Volatility High (5/5)
Hit Frequency N/A

Timber Stacks is set in a vast and beautiful mountain forest, with towering trees and a rugged, natural landscape. The graphics are sharp and detailed, capturing the serene yet powerful atmosphere of the wilderness. A folksy, adventurous soundtrack with the sounds of chopping wood and birdsong creates an immersive and enjoyable classic slot experience.

The symbols are a collection of majestic forest animals and card royals.

  • Regular Symbols: The lower-paying symbols are the J-A card royals. The premium symbols are a fish, a cougar, an owl, a bear, and a wolf, which is the most valuable.
  • Special Symbols:
    • Wild Symbol: A ‘WILD’ symbol that substitutes for all paying symbols.
    • Scatter Symbol: A golden paw print is the Scatter. Landing 4 or more triggers the free spins.

Starting this logging operation is simple. Set your stake, hit spin, and watch the 5×5 grid. When a win occurs, the Increasing Grid Size feature can be triggered. The ultimate goal is to reach the free spins where the grid expansion is enhanced. You can get a feel for the forest by trying the free slot machine demo on our site.

This forest is filled with towering bonus features.

  • Tumble Feature: All symbols in a winning combination are removed, and new symbols fall from above to fill the empty spaces, allowing for multiple consecutive wins from a single paid spin.
  • Increasing Grid Size: After a winning spin where there are no more tumbles, a reel that contained at least one winning symbol will increase in size by adding a new row at the bottom. This continues up to a maximum of 10 rows per reel.
  • Free Spins: Triggered by 4 or 5 Scatters, awarding 8 or 10 free spins. During this round, the Increasing Grid Size feature is active, but the grid does not reset between spins, allowing it to grow to its maximum potential for the entire feature.
  • Bonus Buy: You can instantly trigger the Free Spins feature for a cost of 120x your stake.

RTP: The default Return to Player (RTP) for Timber Stacks is 96.05%, which is a solid, industry-standard rate. Always confirm the RTP version at your chosen casino.

Volatility: This is a very high volatility game. The gameplay is extremely dynamic, with the increasing grid creating more ways to win with every tumble. The free spins round, with its persistent grid growth, is where you can stack up some truly monumental wins.


Timber Stacks is a fantastically innovative and engaging slot. The Increasing Grid Size mechanic is a brilliant feature that builds incredible excitement as the reels expand. Combined with a massive 10,000x max win and a beautiful theme, this is a must-play for fans of high-action, feature-rich games. It’s time to yell “Timber!” and watch the wins fall!

Pros Cons
✅ Innovative and exciting Increasing Grid Size feature ❌ Very high volatility can be challenging
✅ Huge 10,000x max win potential ❌ Base game resets grid after each spin
✅ Powerful free spins with persistent grid growth
✅ Beautiful wildlife theme and graphics

Suitable for: Fans of innovative mechanics, High-volatility players, and lovers of wildlife and nature themes.


What is the RTP of Timber Stacks?

The default RTP of Timber Stacks is 96.05%.

Can I play Timber Stacks for free?

Yes, a free demo is available on our site. You can play it without registration to experience the unique grid expansion feature.

Does Timber Stacks have a free spins feature?

Yes, it has a powerful free spins feature where the grid size increases after wins and does not reset between spins.

What is the maximum win in Timber Stacks?

The maximum win is a huge 10,000 times your stake.

Is Timber Stacks mobile-friendly?

Yes, Timber Stacks is perfectly optimized with HTML5 for a rugged and seamless experience on all mobile devices.


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