Hollow Fog Slot Demo by Moonbite Games

Hollow Fog by Moonbite Games Slot Overview

Hollow Fog leans into a gothic Halloween atmosphere with a polished haunted-graveyard style, moonlit skies, and eerie artwork across its 5×5 grid. The presentation feels cohesive and atmospheric, with the fog mechanic giving the theme real identity rather than just decorative dressing.

Its standout feature is the fog system, where cells lift together to reveal the same symbol and their multipliers combine across winning lines. With High volatility, 20 fixed lines, free spins, and a 20,000x max win, it offers plenty to explore. Try the free demo on BonusTiime.

Hollow Fog Slot Specifications

Hollow Fog runs on a 5×5 grid with 20 fixed lines, and the house edge sits at 4.00%.

RTP (Return to Player)

The RTP is 96.00%, which keeps the long-term return competitive. The house edge sits at 4.00%.

Volatility

High volatility means bigger swings, so the pace can feel streaky and the bankroll needs room for variance.

Max Win

The max win is 20,000x the bet.

Hollow Fog Slot Features

Hollow Fog combines The Fog, Moons and Nights, The Nights, and Devil’s Spin into a layered system where fog cells, moons, free spins, and multiplier growth all interact.

The Fog

Fog cells can land anywhere on the grid, then lift together and reveal the same symbol. That revealed symbol counts as a normal symbol for line wins, so the feature can reshape several lines at once. Fog never covers a moon, which keeps moon behaviour separate.

Fog Multipliers

Each fog cell carries a multiplier, and any winning line is multiplied by the sum of the fog multipliers it crosses. The possible values are x1, x2, x3, x5, x10, x25, x50, and x100. Blood Fog uses x5, x10, x25, x50, and x100.

Moons and Nights

At most one moon can land on each reel, and moons never land on fog. Three moons start The Night, four moons start Pitch Black, and five moons start Blood Moon. Each of these awards free spins with different fog growth settings.

The Nights

During a Night, the fog stays on the grid and spreads to a neighbouring cell on every free spin. Every moon that lands during the Night adds +1 to all fog cells, and any fog cell involved in a win grows further. When the fog is full, the weakest fog cell grows +1 instead.

Devil’s Trident

Before some free spins in a Night, the devil strikes the strongest fog cell and doubles its multiplier. This happens within the free-spin flow, so it can push line values higher without changing the rest of the board. It is a direct boost to the most powerful fog cell.

Bonus Buy

This feature lets players purchase bonus modes or activate persistent modifiers.

• The Night: x100 the bet; starts 10 free spins.
• Pitch Black: x300 the bet; starts 12 free spins.
• Blood Moon: x500 the bet; starts 15 free spins.
• Mystery Cauldron: x265 the bet; starts a random Night.
• Devil’s Spin: x290 the bet; starts one Devil Fog spin.
• Rising Moon: x3 the bet per spin; increases moon frequency.
• Thick Fog: x5 the bet per spin; increases fog and moon activity.

Devil’s Spin

Devil’s Spin starts with one spin and the devil lays 6 to 9 Devil Fog cells on the grid. It always wins because the devil fog covers the first 3 cells of a line. Each cell carries multipliers from x3 to x100, and the round uses the same fog-sum rule.

Hollow Fog Slot Review

Hollow Fog builds its identity through a gothic 5×5 grid, a haunted graveyard look, and a fog system that changes symbols in play. The moonlit setting is not just decoration, because fog never covers moons and the board rules keep both systems visually and mechanically distinct.

The best part is the fog math, where multipliers stack by sum across winning lines instead of acting as simple add-ons. That gives Hollow Fog a sharper edge than a standard fixed-line slot, while High volatility keeps the base game lean and pushes value towards the bonus modes and bonus buy options.

Hollow Fog features persistent fog during a Night, when fog stays on the grid and spreads with every free spin. The 20,000x ceiling gives it real upside, but the experience still depends heavily on landing moons, so the game works best when the mechanics are active rather than when the reels are quiet.

Hollow Fog Slot FAQ