Return to player
96.28%
Min bet size
0.10
Game type
Video Slots
Variance
High
Reels
5
Progressive Jackpot
No
Popularity
Max bet size
100
Game provider
Big Time Gaming (BTG)
Bonus Features
Yes
Paylines
1024
Theme
Horror
Castle of Terror 2 online slot game
Bringing the adrenaline rush of horror and the thrill of gambling together with the familiarity of a well-loved slot, Big Time Gaming brings us the spooky and chilling Castle of Terror 2. Having played with an intense vampire theme with their first slot in this series, Castle of Terror, the sequel takes us to the intensely dark world of Frankenstein’s monster.
The gameplay mimics another BTG’s slot, Max Megaways, a little more than the original Castle of Terror, which helps distinguish it from its predecessor. This combination of continuing a successful theme yet making it different enough for it to feel like a new experience could mean that lightning has struck twice, giving us another strong entry in the horror slot genre.
Castle of Terror 2 Theme, Design, and Core Mechanics Explained
This game is set on a 5x4 grid and gives us a total of 1,024 ways to win. We get wins when matching symbols land on adjacent reels, starting from the leftmost reel.
It is visuals, though, that are one of the game's strongest assets. The grid is filled with objects and characters from a crazed laboratory, and then gadgets, dials, and flashing lights for the free spins bonus round. The frights in Castle of Terror 2 stem from the depth of the design. From Frankenstein's monster’s head resting above the reels, his subtly moving fingers on the sides of the grid, to Igor’s wonky eye, the slot is packed with detail.
The base game keeps us in a misty graveyard, while the bonus rounds transport us to the inside of a horrific experimental lab. Both phases of the game are exceptionally visually detailed and deliciously darkly alive, drawing us into a terrifying world of dead, undead, and ambition bent on breaking the rules of nature.
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Castle of Terror 2 Symbols: Organs, Royals, and Monster Parts
The game’s pay symbols include the 9-A royal cards as low pays. When five matching royals create a win, the awards range from 0.3x to 0.5x the bet. The four high-paying symbols are evocatively included: Lungs, Zombies, and Brain, which is the only symbol that pays for 2 matches (0.4x). Five matching high pays award 0.6x to 1.5x the bet. Wilds are present and substitute for all symbols except scatters, landing specifically on reels 2, 3, 4, and 5.
*The symbol payout chart shown below is calculated based on a $1.00 bet.
| Symbol | 5 Matches | 4 Matches | 3 Matches |
|---|---|---|---|
 | 1.5x | 1x | 0.7x |
 | 0.8x | 0.6x | 0.5x |
 | 0.6x | 0.5x | 0.4x |
 | 0.6x | 0.5x | 0.4x |
 | 0.5x | 0.4x | 0.3x |
 | 0.5x | 0.4x | 0.3x |
 | 0.4x | 0.3x | 0.2x |
 | 0.4x | 0.3x | 0.2x |
 | 0.3x | 0.2x | 0.1x |
 | 0.3x | 0.2x | 0.1x |
Key Features of Castle of Terror 2: Electrifying Modifiers
Where the slot really gets exciting, though, is with the Bonus Respins and the Free Spins feature. Both these features are equipped with a few powerful modifiers.
Bonus Respin
If you land a single scatter in the base game, you get a Bonus Respin. The reel the scatter appeared on is what determines this respin, which offers us five unique possibilities:
- Reel 1 (Brains): All reels are enhanced with extra Brains symbols.
- Reel 2 (Alive): A random multiplier ranging from x3 to x10 is applied to all wins.
- Reel 3 (Shock): Wilds that spin in with the reels receive a random multiplier of x2 to x5.
- Reel 4 (Monster): The Brains, Old Man, Lady, or Lungs symbol randomly becomes wild on reels 2 through 5.
- Reel 5 (Horror): A random reel (2-5) is filled with wilds.
Free Spins
Castle of Terror 2 awards you 10 free spins when you land 2 or 3 scatters, or if one or more scatters appear on your Bonus Respin. The free spins rounds start with a x1 win multiplier, which then increases after every winning spin.
There are 2 or 3 active bonuses throughout the free spins rounds. These are determined by the reels that the triggering scatters have landed on. These modifiers are key to potential bursts of reward:
- Brains: All reels are enhanced with extra Brains symbols.
- Alive: The free spins multiplier starts at a boosted rate of x3, x5, x8, or x10.
- Shock: Wilds spinning in have a random multiplier of x2 to x5 applied.
- Monster: The Brains, Old Man, Lady, or Lungs symbol randomly becomes wild on reels 2 to 5.
- Horror: A random reel (2-5) is filled with wilds on each free spin.
We noted that if we landed 2 or more scatters during the free spins, we were awarded +4 additional spins, and with every scatter beyond the second, we got +2 spins.
Maximize Wins with Feature Buy Access
- Take Strategic Advantage of the Free Spins in Castle of Terror 2
- Given the high volatility of the game, we feel that using the Free Spins would be crucial for wins. Castle of Terror 2 offers you two Feature Buy options to choose from:
- Free Spins (2 Active Bonuses): Costs 100x the bet.
- Free Spins (3 Active Bonuses): Costs 300x the bet.
- These are high risk, yes, but in our experience, they are also the only way to get real big wins. By mirroring the rhythm of horror storytelling, the high volatility of this feature translates into stretches of tension, which are then followed by electrifying bursts of reward.
- Castle of Terror 2 slot features high volatility, which is something all players should consider when playing.. Whether we played on base play mode, Autoplay, made small or big bets, or used the Feature Buy options, Castle of Terror 2 did not give us easy wins. The standard is long spells of no wins sprinkled with the occasional small win. On Autoplay, the frequency of the wins increased slightly, but the dry spells were still long. When it came to buying Free Spins, we did get a big win each time, but every time it was much less than the 100x or 300x amount we had bet.
- The slot does have a max win potential of 20,160x, so massive wins are possible. It is a fun experience for all players, but with the way the algorithm seems to work, it is still more suitable for thrill seekers.
Best Castle of Terror 2 Alternatives - Top Similar Slot Games to Try
- Castle of Terror: Nothing is a better recommendation for someone who enjoys this slot than the original Castle of Terror. A big hit by BTG, it is set in a classic vampire theme. It's clever visual transformation from a fairytale-like springtime atmosphere to thunderclouds over a haunting gothic castle, paired with the high volatility and 61,720 max win, makes it a great choice for thrill-seeking horror fans.
- Life and Death: If you’re looking for something closer to the dark, gothic horror theme of Castle of Terror 2, then Life and Death by Hacksaw Gaming might be more to your taste. Set in an old church with grim reapers floating along the grid, fitting its horror theme, this slot’s 15,000x max win potential and 96.36% RTP will make it a great choice for you.
Our Opinion and Final Verdict
We believe that Castle of Terror 2 successfully delivers another slot-based jolt of horror. While the game is statistically less extreme than its predecessor, featuring a smaller grid, lower RTP, and a trimmed potential, it is certainly no less satisfying.
BTG may have rounded off the edges slightly to make the game more fit for general consumption, but this by no means makes it an easy-going game lacking bite. The top-notch audiovisuals pull us in immediately, letting the gameplay handle the high-suspense action. The suspense builds wonderfully, especially as each reel stops in the free spins, right before chaos potentially erupts. To add to this, the high-risk element of the game adds an edge of tension to the gameplay.
In short, its strong atmosphere, design detail, and electrifying mechanics make it an overall impressive addition.
James is a casino games expert on the Playcasino.com editorial team. With many years of professional experience at a leading casino game development company and a passion for playing casino games, James has become a true expert in slots, blackjack, roulette, baccarat, and other games.
James uses this expertise to provide reliable, insider advice through his reviews and guides, breaking down the game rules and offering tips to help you win more often. Rely on James's extensive experience for expert advice on your casino play.
