Infinity Reels is a mechanic in which each win adds another reel to the right of the grid, and the game respins. The process repeats until a spin adds no new win, so the number of reels and ways to win can keep growing.
Games usually start with three reels. A win on three reels adds a fourth, a win reaching the fourth adds a fifth, and so on, with the ways count rising each time. Many versions attach a multiplier that increases as reels are added, and free spins rounds often keep the extra reels between spins.
The structure means most spins are short, with occasional long chains, which points to high volatility. "Infinite" describes the design, not the payout: the game still has a max win and a published RTP. See our Infinity Reels feature page.