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Play’n GO · Slot Review

House of Doom 2: The Crypt — Full Review & Free Demo

3.7/5
Play for Real →
RTP
96.25%
Volatility
High
Max Win
6,000x
Provider
Reels
5
Paylines
20
Bet Range ($,€,£)
0.20 - 100
Rating
3.7/5
Released
Mar 2021

House of Doom 2 The Crypt: Slot Overview

House of Doom 2: The Crypt is Play'n GO's sequel to the 2018 Candlemass-branded original, built on a 5-reel, 3-row, 20-payline grid with stakes from 0.20 to 100 per spin. Default RTP sits at 96.25% with a volatility rating around 7/10, leaning medium-high. The hook here is three rotating base game domains, each with its own doom metal track and its own wild modifier.

Symbols and Paytable

Low pays are gothic-script 10 to A card royals. Premiums are daggers, a nightshade flower, lit candles and a spiky skull at the top of the ladder. Premium hits pay decently for five of a kind, but nothing in the base paytable is going to carry a session on its own.

Four female character wilds drive the math: Queen of the Damned, Fire Mistress, Metal Priestess, and the Crypt Spins-exclusive Spirit of Unity. All four pay 25x stake for five on a line and substitute for everything except the Crypt scatter. The Crypt scatter only lands on reels 1, 3 and 5, and upgrades to a Flaming Crypt scatter when caught inside a Spirit Gate.

Symbol Payouts

icon 1
Wild
5x25
4x5
3x2
icon 2
Wild
5x25
4x5
3x2
icon 3
Wild
5x25
4x5
3x2
icon 4
5x10
4x2.5
3x1.5
icon 5
5x5
4x2
3x1
icon 6
5x4.5
4x2
3x1
icon 7
5x4
4x1.5
3x0.75
icon 8
5x3.5
4x1.5
3x0.4
icon 9
5x3
4x1.5
3x0.3
icon 10
5x2.5
4x1
3x0.3
icon 11
5x2
4x0.5
3x0.2
icon 12
5x2
4x0.5
3x0.2
icon 13
Scatter

Bonus Features and Crypt Spins

Spirit Gate Frames appear at random on the reels in the base game. Land a wild inside one and it expands to cover the reel, then triggers a respin with the active domain's modifier. Queen of the Damned plants Spirit Gates on every reel for the respin. Fire Mistress slaps a random 2x, 3x, 5x or 10x multiplier on the respin win. Metal Priestess upgrades all premium relics to the top skull symbol.

Three Crypt scatters on reels 1, 3 and 5 trigger free spins with at least one Spirit Gate guaranteed per spin. Catch three Flaming Crypt scatters, either through a Queen respin or upgraded scatters in free spins, and you get 8 Crypt Spins. This is where Spirit of Unity enters: drop her in a Spirit Gate and you get a respin with all three modifiers stacked simultaneously. Retriggers are unlimited.

Bonus Buy Options

Bonus Buy Spirit Gate Respins
Spirit Gate Respins
A wild landing inside a Spirit Gate expands to fill the reel and triggers a respin with a domain-specific modifier (Queen of the Damned, Fire Mistress, or Metal Priestess).
Feature Cost: N/A
Bonus Buy Free Spins
Free Spins
Triggered by 3 Crypt scatters on reels 1, 3 and 5. At least one Spirit Gate per spin, with the modifier tied to the active base game zone.
Feature Cost: N/A
Bonus Buy Crypt Spins
Crypt Spins
8 spins awarded by 3 Flaming Crypt scatters. Spirit of Unity wild can land in a Spirit Gate and activate all three modifiers simultaneously. Retriggerable indefinitely.
Feature Cost: N/A

RTP, Volatility and Max Win

Default RTP is 96.25%, but Play'n GO ships this title with multiple RTP configurations and operators can run it as low as 94.25%. That is a 2% gap in house edge, which translates to roughly 40% faster bankroll burn on the bad version. For serious players, always check the info screen in real money mode and confirm you are on the 96.25% build before sinking volume into it.

Max win is capped at 6,000x stake. At 100 per spin that is 600,000 in theoretical top payout, hit only when free spins, modifier stacks and premium alignment all converge. The ceiling is too low for this variance profile when you compare it to Testament at 20,000x or other Play'n GO metal entries. Bonus hunters chasing top-end will look elsewhere.

Bankroll and Bonus Buy

There is no bonus buy here. Every Crypt Spins entry has to be earned through natural play, which means the variance curve hits in full and session outcomes hinge on whether you trigger at all. Sources are split on this: one positions a buy as available in some markets, but the bulk of evidence and the official math suggest no buy in the standard release.

With a proper bankroll I would budget at least 500x stake to ride out base game dry spells before the first meaningful Crypt Spins hit. The medium-high volatility and 20 paylines mean dead spin frequency is moderate, not punishing, but the max win cap limits how much you can recover in a single bonus. Treat it as a session grinder, not a one-shot ceiling chase.

💬 What Players Say
Reception is split. Doom metal fans appreciate the upgraded soundtrack and nested features, but mainstream players find the music polarising and the 6,000x ceiling underwhelming relative to other Play'n GO metal slots. Based on 6 reviews.
Ryan Cole’s Verdict

Final Verdict

House of Doom 2 The Crypt is a polished sequel with smarter math than the original. Three domains, four wild types and stackable modifiers in Crypt Spins give it real depth, and the 96.25% RTP holds up if you pick the right operator. The atmosphere is genuinely well done if you can stomach doom metal.

For me as a high roller though, the 6,000x ceiling is the dealbreaker. The volatility profile asks you to sit through dry stretches and respect the bonus structure, but the reward at the top doesn't match the patience required. No bonus buy further limits how you can attack it. Decent for grinders and Candlemass fans, underwhelming for anyone hunting genuine bonus value.
3.7
★★★★☆
out of 5
✓ Pros
Stackable modifiers via Spirit of Unity wild
Three unique doom metal soundtracks per zone
Crypt Spins can retrigger indefinitely
Solid 96.25% RTP on the top configuration
Bet range up to 100 per spin
✗ Cons
Max win of 6,000x is weak for the variance
No bonus buy to skip the grind
RTP can drop to 94.25% at lazy operators
Doom metal soundtrack is an acquired taste
Nested features can feel confusing early on
Ryan Cole
Ryan Cole
Lead Casino Slots Analyst
5+ years analysing online slots for the UK market. Every game is played for a minimum of 500 demo spins before publication. No affiliate bias — ever.
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House of Doom 2: The Crypt FAQ
How do you trigger Crypt Spins in House of Doom 2?
Either land a Queen of the Damned respin that produces 3 Flaming Crypt scatters via Spirit Gates, or upgrade all 3 regular scatters during free spins by having them land inside Spirit Gates. Either route awards 8 Crypt Spins.
What does the Spirit of Unity wild actually do?
Spirit of Unity only appears during Crypt Spins. If she lands inside a Spirit Gate, you get a respin with the Queen of the Damned, Fire Mistress and Metal Priestess modifiers all active at once, the strongest single event in the slot.
Is there a bonus buy on House of Doom 2 The Crypt?
The standard Play'n GO release does not include a bonus buy, so all free spin entries must be triggered through natural play. Some sources mention a buy exists in select markets, but it is not part of the core math model.
What is the max win and how realistic is it?
Max win is capped at 6,000x stake. Hitting it requires Crypt Spins with stacked Spirit of Unity respins, multiple Fire Mistress multipliers and premium alignment converging in one session, statistically very rare.
How does House of Doom 2 differ from the original House of Doom?
The sequel adds three rotating base game domains with separate Candlemass tracks, four character wilds instead of one, Spirit Gate respins with domain modifiers, and a dedicated Crypt Spins layer. Max win is also more than doubled compared to the first game.