Timber Stacks
Timber Stacks is a wilderness-themed slot by Pragmatic Play played on an expanding 5x5 grid with up to 100,000 ways to win. Winning combinations trigger a tumble mechanic that replaces matched symbols for consecutive win opportunities. When no more tumbles occur, the grid can spontaneously expand by dropping symbols into newly added bottom rows. Landing four or more scatter symbols triggers a free spins bonus round, where this expanding grid mechanic remains fully active.
RTP published by the studio / Timber Stacks
96.5%
Scale starts at 95% · other versions not published
Figures: Pragmatic Play game page, Pragmatic Play demo game, checked October 5, 2026; each value is linked to its page in the game facts table. Artwork © Pragmatic Play; image file from the Slots-Info slot database, not supplied by the studio.
10,000×
Max win, × stake
1
RTP version published · others not published
Yes
Bonus buy
Game facts
| Metric | Value |
|---|---|
| Studio | Pragmatic Play1 |
| RTP versions | 96.5%1 |
| Other RTP versions | Not published by the studio |
| Volatility | Not published |
| Max win | 10,000× stake2 |
| Bet range | Not published by the studio |
| Layout | 5x5 · Up to 100,000 ways3 |
| Features | Tumble Mechanic, Increasing Grid Size, Free Spins, Bonus buy, Ante bet1 |
| Bonus buy | Yes2 |
| Release date | November 6, 20233 |
Numbers link each value to the page it comes from. “Not published” means the studio does not state it; we add it when it does and never estimate a spec. Figures from casino sites are not used.
RTP versions
Pragmatic Play publishes one RTP setting for Timber Stacks: 96.5%. Other RTP versions are not published by the studio. Check the game’s help or paytable screen at your casino to see which version it runs.
| RTP version | House edge | Return per $100, long run | vs highest |
|---|---|---|---|
| 96.5% (highest) | 3.50% | $96.50 | — |
House edge = 100% minus RTP. RTP is a long-run average across all players, not a prediction for a session.
Features
- Tumble Mechanic
- Increasing Grid Size
- Free Spins
- Bonus buy
- Ante bet
Where it’s available
Not confirmed. Availability in regulated North American markets is not confirmed yet.
Regulated markets only; availability varies by casino.
