A 2017 Barcrest classic where the castle portcullis grinds upward to double the grid from 5×5 to 5×10. Still worth a spin?
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Play Mighty Black Knight at UK Licensed Casino
Barcrest dropped Mighty Black Knight back in 2017, and Light & Wonder still keeps it on rotation for good reason. The whole thing is built around one trick: a 5×5 grid bolted to a torch-lit castle wall that suddenly stretches into 5×10 when a knight shows up. Paylines double from 50 to 100 mid-spin. You can see the top half the entire time, dimmed behind a wooden portcullis, which is a small but very effective bit of tease.
The signature feature is Mighty Reels. Any Black Knight Wild landing on the reels grinds the portcullis upward, the grid stretches, and you keep playing on doubled lines until the next spin resets it. Pair that with the wild's expanding rule (and the rule is genuinely generous, any sliver of him peeking into view fills the whole reel) and the math starts to make sense. Maths-wise the cap sits at 5,000x your bet. Honestly, for a slot marketed as high volatility in 2017, that ceiling feels a bit modest now.
Free Spins come from three or more scattered Bonus symbols in view, awarding 8, 12 or 20 spins respectively. Retriggers are on the table. There's one annoyance worth flagging: free spins always open with the portcullis DOWN and Mighty Reels switched off, even if you triggered them mid-expansion. You're effectively starting the bonus on the smaller grid and rebuilding from scratch. Stingy little design choice.
And then there's Premium Play, which is its own beast. You commit to fixed stakes of GBP 2, 5 or 10, then play a 3-reel mini game on one win line. Match three and you unlock 5 linked spins of the main reels with wilds that lock in place until they form a win. All payouts are held back and settled together at the end of the fifth spin. RTP climbs to 98% in this mode, but it isn't a buy-bonus shortcut. It's a heavier commitment, and you should treat it like one.
RTP across the rest of the game? 94% at small stakes, 96% once you cross GBP 2. The 94% floor is poor by 2026 standards, so play above the threshold if your bankroll allows. But the artwork, the heraldic suits in blue, red, pink and purple, the veiled Queen up top, the brass torches flickering against deep purple stone, all of it still holds up. Worth a few spins if you've got patience.
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