Mysterious

Mysterious is a Victorian London slot from Pragmatic Play, played on a compact square grid with a very large number of fixed paylines. Fog, gaslight and a cast of period characters give it a gothic mood, and three character-based wilds cycle through the base game.

The Lord brings a multiplier wild, the Lady brings a mystery symbol, and the Baron brings an infectious wild that spreads to adjacent positions. The Free Spins are where the structure changes: the grid expands to a wider layout and swaps fixed paylines for ways to win, so many more combinations become possible. Before the round starts, the player picks a modifier, either Locking Multiplier spins or Roaming Wild spins whose wilds shift position each spin.

It may suit players who enjoy a grid that changes shape between base game and bonus, and who like to choose how the feature plays out. The free demo uses play credits, so no real money is involved, and results are random. The published RTP is 96.50%.