Jewel in the Crown Slot by Light & Wonder

The layout is the first thing that registers: reels 1 and 5 stand four symbols tall, reels 2, 3, and 4 sit at three, so the playable area is 17 cells arranged in a crown-shaped silhouette across 13 lines (10 paid plus 3 free bonus lines included on every spin). Above the outer reels sit two ornate British pub fruit machine crowns done up in royal blue and ruby red. Each one displays a single locked symbol going into a Free Spins round. Blue crown picks the Wild. Red crown picks the Mega Stack, which fills entire reel slots for the duration of the bonus. If both crowns lock the same symbol, that pick is wild AND mega stacked at once, which is the dream draw of the whole game.

The RTP works in three tiers based on stake. Below £2.00 the slot pays as a standard left-to-right line game at 94%. Cross the £2 threshold and ALL WINS PAY ADJACENT switches on automatically, lifting the return to 96%. Adjacent means winning combos no longer have to start from reel 1: three or more matching symbols touching anywhere along a payline count, and a single line can carry more than one win at the same time. Big Bet mode runs at 98%.

Three Crown scatters on reels 2, 3, and 4 trigger 8 free spins. Three more during the round add 16 more on top, which is the unusual part: the retrigger is twice the trigger. Smaller +1, +3 and +8 pickup awards also drop inside the round. Adjacent pays stay active throughout regardless of the base stake you came in on.

Big Bet runs as fixed five-spin sessions at £20, £30, or £50. The £20 and £30 tiers track a Crowning Glory Trail: every Crown on screen advances the meter, position 5 awards a held bonus spin, position 6 awards 8 free spins, and 3 Crowns in one spin still pays the standard 8 immediately. The £50 SUPER tier upgrades both endpoints to 8 and 16 free spins. At £30 and £50, the Jewel Stacks rule kicks in during base Big Bet play: every stacked symbol on the reels is guaranteed to be a blue, red, or green gem. No buy bonus, no ante bet, just three pricing doors to walk through. Light & Wonder reissued this one from the Barcrest catalogue under © 2016 Scientific Games, and the math still holds up.