Wildchemy

Wildchemy by Relaxgaming is a video slot set on a 5×5 grid, transporting players into a post-medieval alchemist’s laboratory full of bubbling potions, strange instruments, and a robot assistant. Wins are formed when three or more matching symbols land adjacent horizontally or vertically, rather than along fixed paylines, and after each win these symbols are removed in a cascading style so new ones fall in place. A “Magical Portals” feature occupies the top-left and bottom-right corners of the grid; when the same symbol appears in both portals in a single spin, every instance of that symbol on the entire grid transforms into Wilds. The game includes Scatter symbols in the form of potion flasks; these trigger explosions in a cross or plus-shape, clearing surrounding symbols and contributing toward triggering the free spins mode. Collecting four or more Scatters in a single spin or via cascades will activate free spins; each extra Scatter beyond the fourth awards four extra free spins. During the free spins feature an additional portal is added in the top-right corner, increasing the chances for portal combinations, and all wins in free spins are subject to a 2× multiplier. There is no retriggering of free spins since Scatters do not appear during the free spins round itself. The game offers a Wild symbol (a golden ‘W’) which substitutes for other symbols except for Scatters. UNKNOWN about any bonus buy being available—it appears this game does not include a bonus buy option.

You can play it for real money.