Mr. Hallow-Jackpot! Slot by PG Soft

Non-winning spins have a second chance here. The Mini-Haunt Feature fires randomly on any base game spin that produces no win and no scatter, picking one of four symbols - Hand, Skull, Bat, or Spider - and stamping 5 to 8 copies of it across the grid. The replacement is always enough to form at least one paying combination, so what looked like a dead spin turns into a guaranteed hit. It accounts for roughly 18.5% of the total return, which is substantial for what's essentially a consolation mechanic. The four replacement symbols are all mid-range pays, so don't expect huge numbers from Mini-Haunt alone, but it keeps the balance from bleeding during dry stretches.

Free spins split three ways depending on scatter count: 3 scatters award 8 spins, 4 give 12, and 5 give 20. The bonus has two upgrades over base game. First, any Wild that lands on the reels stays for the rest of the round, but it doesn't stay put - each subsequent spin moves it to a new random position on the grid. Stack a few of these roaming Wilds across several spins and the grid starts filling with substitutes that keep shifting around, bridging new connections on every spin. Second, a multiplier progression runs above the reels at x2, x4, x6, and x10. Scatters don't appear during the bonus, so there's no retriggering - what you get at the door is all you get.

Teal fog rolls behind a crooked Halloween manor, with Mr. Hallow himself looming above the reels in a purple tailcoat and top hat, pumpkin head grinning. The low-pay symbols are silver card suits (spades, hearts, clubs, diamonds) with a slightly ornate, gothic treatment, while the premiums run through the expected roster: spiders, bats, skulls, a severed hand, and a carved jack-o-lantern that doubles as the game's most valuable regular symbol. It's a 2019 release and the art holds up fine, though the portrait orientation and mobile-first layout are obvious PG Soft signatures from that era.