Timber Stacks™

Timber Stacks™ by Pragmatic Play is a high-volatility slot on a 5x5 grid with 3,125 ways to win. Matching symbols, including fish, owls, bears and wolves, must land from left to right, while a mountain Wild can appear on reels two, three and four to replace all symbols except the Scatter. A demo version is available for players who want to play for free and practice before playing for real money.

The game uses a tumble mechanic, removing winning combinations and replacing them with new symbols for additional chances on the same spin. If no further wins remain, the reels can expand to 10x5, increasing the number of ways to win to as many as 100,000 before returning to the standard grid size.

Landing four or more Scatters triggers the free spins bonus round, which awards at least eight free games. The expanding-grid feature also works during the bonus round, and in some jurisdictions the bonus can be purchased for 120x the bet, starting the next spin with at least four Scatters.