Stepping ashore at Under the Keystone
Water mint, a jar of blackberries, a bullfinch and the red-and-green butty boat fill the reels, with the towpath fingerpost as the scatter. Winning symbols wash away and the chain pays more with each new win, so this high-volatility landing can stay quiet for a while before a run.
Under the Keystone is a landing on the Lock Country. Brick locks, painted narrowboats, willow-hung punts and a steam train high over a gorge.
What the symbols of Under the Keystone pay
Each award is a multiple of your total play amount for three, four or five matching symbols along one of the 15 fixed lines, counted from the leftmost reel. The wild covers for any symbol but the scatter.
Free spins at Under the Keystone
Three, four or five scatters anywhere on the reels start 8, 12 or 20 free spins. Landing three or more again during the feature adds another set. Free spins pay at the usual values, and each cascade inside the feature still lifts the chain multiplier.
The tumbling weir current at Under the Keystone
After a win the winning symbols vanish, those above fall into the gaps and new ones fill from the top. Each further win in the same round pays more: double, then triple, then five times.
More on the tumbling weir current and the other four landings where it runs.









