Emerald's Infinity Reels slot by Relax Gaming is a Irish theme based game with 3x4 reels and Infinity Reels mechanics.
The Infinity Reels mechanics makes the reels spin as long as you continue hitting wins during the same spin. So, when three matching symbols land as any "normal" win, will cause the reels to jig their way to the left, re-spinning for as long as matching symbols keep coming. Every time a reel moves out of screen, symbols are collected and applied to the win as multipliers, adding to your pot of gold throughout the gameplay.
When you land three bonus symbols the game will trigger a minimum of 12 Free Spins. In free spins collected symbols are stored for the duration of the round, building up multipliers and bringing pots of gold. If you collect a special x2 multiplier symbol it will double all collections, while three bonus symbols can re-trigger your free spins.
From Relax Gaming