Gravebell Hour Slot Demo by Clover Labs

Gravebell Hour by Clover Labs Slot Overview

Gravebell Hour by Clover Labs brings cartoon gothic art, candlelit crypts and neon-green fog to its graveyard setting. Its Expanding Wilds share a mechanic with Wanted Dead or a Wild, but here Skull Wilds also double the symbol-specific tombstone multipliers they cover.

The Tombstones gives each symbol its own multiplier, doubling after that symbol wins and retaining progress throughout free spins. High volatility and a maximum win of 50,000x the bet add further interest. Explore these mechanics with the free demo on BonusTiime, without an account or deposit.

Gravebell Hour Slot Specifications

Gravebell Hour uses a 6×4 grid and 4,096 ways to win. Symbols connect from the left on adjacent reels, while tombstones and Skull Wilds add extra depth to the online slot gameplay.

RTP (Return to Player)

96.00% RTP gives Gravebell Hour a solid long-term return. The house edge sits at 4.00%.

Volatility

High volatility means the game can swing sharply, with wins and bonus hits arriving in a less even rhythm.

Max Win

50,000x the bet caps Gravebell Hour; a €1 spin can reach €50,000.

Gravebell Hour Slot Features

The Tombstones, Skull Wilds, Free Spins, Skull Spin, Mystery Bonus, Ante and the Bonus Buy options shape Gravebell Hour into a feature-heavy Clover Labs slot with symbol-specific multipliers and several ways to access the bonuses.

The Tombstones

Every symbol has its own tombstone above the frame, starting at x1 in the base game. When a symbol wins, that win uses its current tombstone value; its tombstone then doubles to x2, x4, x8 and beyond. In free spins, the tombstones never reset.

Skull Wilds

Skull Wilds land on reels 2 to 5 and replace every symbol except the Crypt Bell. Each one expands to fill the whole reel, then doubles the tombstone of every symbol it covers. The reel stays wild until the spin ends, and in some bonus modes Skull Wilds appear on every free spin.

Free Spins

3 Crypt Bells trigger the Bonus with 8 free spins, 4 trigger the Super Bonus with 10 free spins, and 5 or more trigger the Hidden Bonus with 12 free spins. During free spins, 1 or 2 Crypt Bells add 1 spin each, while 3 or more add 4.

Skull Spin

Skull Spin costs x6 the bet per spin, and every spin lands a Skull Wild. The wild expands to fill its reel and doubles the tombstones it covers, but the game plays without free spins. Tombstones return to x1 after each spin, so the multiplier growth stays temporary.

Mystery Bonus

The Mystery Bonus lets the bonus menu decide the outcome. It always awards a bonus round: 3 Crypt Bells start the Bonus, 4 start the Super Bonus, and 5 start the Hidden Bonus. Each result plays exactly like the same bonus reached naturally.

Ante

Ante costs x2 the bet per spin and increases the chance of triggering Free Spins. The game rules state that a permanent 2x stake makes free spins 3x as likely to trigger. It does not change the core feature set, but it changes the rhythm of bonus access.

Bonus Buy

The Bonus Buy menu lets players purchase direct access to features or adjust the trigger route. Each option uses the current bet as its cost basis.

• Ante: x2 the bet per spin, free spins trigger 3x as often.
• Skull Spin: x6 the bet per spin, a Skull Wild on every spin and no free spins.
• Bonus: x100 the bet, 8 free spins with reset-proof tombstones.
• Super Bonus: x500 the bet, 10 free spins with Skull Wilds.
• Mystery Bonus: x500 the bet, Crypt Bells decide the bonus outcome.

Gravebell Hour Slot Review

Gravebell Hour builds its identity with a graveyard setting, neon green framing and cartoon horror art that keeps the tone playful rather than grim. The skulls, tombstones and candlelit crypt backdrop give the slot a clear gothic look, while the expanding symbols make the theme feel tied to the mechanics.

The main strength sits in the Tombstones system, because each symbol can build its own multiplier as wins chain through tumbles. That gives the game more purpose than a plain ways slot, especially when Skull Wilds land and double what they cover. The high volatility still keeps the action uneven.

Gravebell Hour offers feature buying through its bonus menu, while the Hidden Bonus starts with 12 free spins and retains tombstone progress throughout the round. The base game is competent, but the real value comes from stacked features rather than ordinary spins, which keeps it above standard release-level filler.

Gravebell Hour Slot FAQ