Grave Oath Slot Demo by Valhalla Slots

Grave Oath by Valhalla Slots Slot Overview

Grave Oath by Valhalla Slots brings a gothic graveyard to life with glowing green fog and a skeletal knight. Its cascading reels share a mechanic with Sweet Bonanza 1000, but here collected lanterns build a multiplier that applies to the whole spin win.

The Sigil clears regular symbols while preserving lanterns and scatters, creating fresh opportunities for wins. The Oath multiplier carries through free spins, adding depth to this high-volatility slot with a 50,000x maximum win. Explore these mechanics in the free demo on BonusTiime, without an account or deposit.

Grave Oath Slot Specifications

Grave Oath runs on a 6×5 grid with Pay Anywhere wins, so matching symbols can land across the board. The house edge sits at 3.50%, keeping the maths clear in this Valhalla Slots slot.

RTP (Return to Player)

The RTP is 96.50%, which supports fair online slot gameplay. The house edge sits at 3.50%.

Volatility

High volatility means bigger swings, so bankroll management matters during longer sessions.

Max Win

The max win is 50,000x the bet, so a €1 spin caps at €50,000.

Grave Oath Slot Features

Grave Oath combines Oath collection, Sigil chain clears, Free Spins, and the Bonus menu, all built around lantern-driven wins and layered bonus choices.

The Game

Grave Oath uses a board of 6 reels and 5 rows, with Pay Anywhere wins for 8 or more matching symbols. Winning symbols break away, symbols above fall, and new symbols drop in, so one spin can chain several wins before it ends.

Lanterns and Oath

Lanterns land on the board, fall with the tumbles and stay until the spin ends. At the end of a winning spin every lantern is collected into the Oath, greens first and then violets: a green adds its value, a violet multiplies the Oath. The first green collected in a round replaces the starting x1, and the Oath then multiplies the whole spin win once. No win means no collection. In free spins the Oath is kept from spin to spin and grows with every winning spin.

• Green Lanterns: carry +N, added to the Oath.
• Violet Lanterns: carry xN, multiplying the Oath.
• Base Game: +2 to 20 and x2 to 3.
• Vigil: +2 to 100 and x2 to 3.
• Requiem: +2 to 100 and x2 to 5.
• Black Oath: +50 to 100 and no violet lanterns.
• Eternal Oath: +75 to 100 and x2.
• Oath Strike: +50 to 100 and x2 to 10, both at the start.

Sigil

When nothing more pays and a Sigil is on the board, the knight strikes and removes every regular symbol and every Sigil. Lanterns and scatters stay in place, new lanterns can rise into the gaps, and the board checks for wins again. Sigils can chain, but the Sigil itself pays nothing.

Free Spins

Scatters count on the settled board after every tumble and every Sigil. 3 scatters open Vigil for 8 free spins, 4 or more open Requiem for 10 free spins, and 3 or more hidden scatters open Black Oath for 10 free spins. Eternal Oath awards 10 free spins and opens only from Crypt with 4 hidden scatters. In every bonus, 3 or more scatters add 3 free spins, and the Oath carries through. A round plays at most 50 free spins.

Bonus

The Bonus menu holds one feature you switch on for every spin and five one-time buys. Every price is a multiple of the bet, confirmed before play starts, and every bought bonus first drops its scatters before the round begins.

• Doom Chance: x3 the bet per spin; stays on until switched off, for a bonus about 6.3 times as often.
• Vigil: x100 the bet; 3 scatters, 8 free spins.
• Requiem: x300 the bet; 4 scatters, 10 free spins.
• Oath Strike: x500 the bet; one spin that starts with 2 green lanterns and 1 violet lantern.
• Three Graves: x500 the bet; pick 1 of 3 graves for Vigil, Requiem, Black Oath or an empty grave, which pays 0.
• Crypt: x500 the bet; pick 1 of 3 crypt doors for Black Oath, Eternal Oath or an empty crypt, which pays 0.

Grave Oath Slot Review

Grave Oath builds its identity from a gothic graveyard setting, green fog, and a skeletal knight wrapped around the reels. The lantern system gives the artwork a clear purpose, while the Sigil and dark cathedral backdrop keep the screen focused on necromantic tension rather than decorative clutter.

The gameplay stands out because Pay Anywhere wins can cascade, then lanterns add to the Oath and multiply the whole spin result. That gives the slot a proper escalation hook. The downside is the high volatility format, which makes the base game feel dependent on the board opening up before the features really matter.

Grave Oath offers feature buying through its bonus menu, while Doom Chance increases bonus frequency at an increased cost per spin. The 50,000x ceiling gives the structure real ambition, but the game still leans hard on its own mechanics landing in the right order.

Grave Oath Slot FAQ