Quick answer
Castle of Terror 2 is a Big Time Gaming slot (2025) with 96.48% RTP, high volatility and a 20,160x max win. It uses 1,024 ways with respins, multipliers and free spins. RTP can vary by casino.
Key specs
- RTP
- 96.48%
- Volatility
- High
- Max win
- 20,160x
- Grid
- 5×4
- Pays
- 1,024 ways
- Released
- 15 October 2025
- Jackpot
- None
Not published by the provider: bet range
Casinos with Big Time Gaming games
- Solstice Spins50 Free Spins No Deposit + 100% up to $50035x bonusCarries Big Time GamingPlay at Solstice Spins (opens in new tab)
18+. New customers. Min dep: none for the free spins; $20 for the match bonus. 35x bonus wagering. Max bet $5. 14 days. 50 spins on Starburst at $0.10. Spin wins capped at $100. Full T&Cs apply.
Key terms
18+. New customers only. No deposit needed for the free spins. Min deposit $20 for the match bonus. 35x bonus wagering requirement. Max bet $5 while wagering. Free spins on Starburst at $0.10 per spin. Max win from free spins $100. Offer valid 14 days. Full T&Cs apply. Please gamble responsibly.
Check Castle of Terror 2 is in the lobby in your country.
Themes:
Part of the Castle of Terror series.
How to play Castle of Terror 2 (members only)
Instead of fixed lines, matching symbols on adjacent reels pay in any position, starting from the leftmost reel. The more matching symbols there are on each reel, the more ways the combination pays.
Castle of Terror 2 is played on a 5×4 grid with 1,024 ways.
- Set your stake. Choose your total bet per spin. Wins are paid as multiples of this stake.
- Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
- Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
- Trigger the bonus. Land the required scatter symbols to start the free spins feature.
- Optional bonus buy. Where permitted, pay a fixed price to start the bonus directly.
The full Castle of Terror 2 guide: how winnings work, 4 features and 5 strategy tips
- Your stake plan: a $50 budget → about $0.17 a spin (high volatility)
- What 96.48% RTP costs per $100 wagered: $3.52 on average
- 4 features explained: respins, multipliers, free spins, bonus buy
- Bonus-buy risk breakdown
- Stake plans for $20 to $250 budgets
- 3 RTP versions compared: 96.48%, 94.39%, 86.39%
- 4 slots with the same style and a higher RTP (up to 98.12%)
- Strategy tips and a session planner for Castle of Terror 2
Free · no card · 18+ only
Never sold · export or delete any time · What do members get?
How winnings work (members only)
What 96.48% RTP costs per $100 wagered, the 20,160x max win at a $1 stake
The top prize is capped at 20,160x your stake. On a $1 spin that is $20,160; on $0.20 it is $4,032. When the cap is reached the round usually ends immediately.
Multipliers are applied to wins as they land; in many games several multipliers add together or multiply each other, which is where the largest wins come from.
What 96.48% RTP means
Expected return = stake × 96.48%
Over $100 of total bets, the long-run average loss is $3.52
RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a high volatility game.
Features explained (members only)
4 features explained: respins, multipliers, free spins, bonus buy
Respins
Selected reels or the whole grid spin again without a new stake, usually triggered by a specific symbol combination or near-miss feature.
Multipliers
Multipliers increase a win by a set factor, such as 2x or 10x. They can be attached to symbols, applied to a whole spin, or grow during a feature, and are a main driver of the biggest wins.
Free spins
A bonus round of spins played at no cost to your balance, usually triggered by landing three or more scatter symbols. Wins during the round are added to your balance, and many games let you retrigger extra spins.
Bonus buy
Lets you pay a fixed multiple of your stake to enter the bonus feature straight away instead of waiting for it to trigger. It raises variance considerably and is not available in every country (it is banned in the UK).
Strategy tips (members only)
- Size your stake to the volatility. High volatility concentrates the return in rare, large wins. Long losing runs are normal. Keep stakes small (around 1% of your session budget or less) so you can ride out the swings. A simple rule: bring at least 300 spins' worth of budget, so a $50 budget suggests a stake of about $0.17.
4 more tips and a session planner
- Check which RTP version you're playing. Big Time Gaming offers this game at 96.48%, 94.39%, 86.39%. Open the game rules at your casino and prefer sites running the 96.48% version.
- Treat bonus buys as high-risk. Buying the feature concentrates your budget into a few large-variance rounds. Many results return less than the price paid. Read our bonus buy guide first.
- Bonus wagering: at 96.48% RTP, clearing $1,000 of wagering costs about $35.20 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
- Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.
More on this in slot RTP and volatility explained and bankroll management.
Does it fit your budget? (members only)
Stake plans for $20 to $250 budgets
For high volatility we suggest a budget of at least 300 spins. This is what that means for Castle of Terror 2.
| Budget | Stake a spin | Bet range | Average cost of 300 spins |
|---|---|---|---|
| $20 | $0.07 | Bet range not published | $0.70 |
| $50 | $0.17 | Bet range not published | $1.76 |
| $100 | $0.33 | Bet range not published | $3.52 |
| $250 | $0.83 | Bet range not published | $8.80 |
Averages only: a short session can end far above or below them. Set a loss limit before you play.
RTP versions (members only)
3 RTP versions compared: 96.48%, 94.39%, 86.39%
Big Time Gaming supplies Castle of Terror 2 in 3 RTP versions and each casino chooses which one to run. Over $1,000 of bets, the 86.39% version costs about $100.90 more on average than the 96.48% version.
| Version | Average cost per $100 wagered | Extra vs best |
|---|---|---|
| 96.48% (best) | $3.52 | — |
| 94.39% | $5.61 | +$2.09 |
| 86.39% | $13.61 | +$10.09 |
Open the game's rules or info screen at your casino to see which version it runs.
Seen a different version at a casino? How member RTP reports work
Same style, better RTP (members only)
4 slots with the same style and a higher RTP (up to 98.12%)
Slots with the same mechanic (ways to win) and volatility (high) as Castle of Terror 2, with a higher published RTP. Casinos can still run lower versions of any of them.
Marching Legions98.12% RTP · +1.64 pts
Bomb Runner98% RTP · +1.52 pts
Carnival Cove98% RTP · +1.52 pts
Fire Rooster98% RTP · +1.52 ptsQuestions
Frequently asked questions
Who makes Castle of Terror 2?
Castle of Terror 2 is developed by Big Time Gaming and was released in 2025.
What is the RTP of Castle of Terror 2?
The default RTP of Castle of Terror 2 is 96.48%. Big Time Gaming also supplies versions at 94.39%, 86.39%, so check the game's info screen at your casino.
Is Castle of Terror 2 high volatility?
Castle of Terror 2 is rated high volatility. High volatility concentrates the return in rare, large wins.
What is the max win on Castle of Terror 2?
The maximum win on Castle of Terror 2 is 20,160x your stake, which is $20,160 on a $1 spin.
Can I play Castle of Terror 2 for free?
Not on GambGenius at the moment: we don't list an official Big Time Gaming demo of Castle of Terror 2.
Does Castle of Terror 2 have a bonus buy?
Yes. Castle of Terror 2 includes a bonus buy option, although it is unavailable in some countries such as the UK.
Where can I play Castle of Terror 2?
Solstice Spins carries Big Time Gaming games. Check Castle of Terror 2 is in the lobby in your country before you sign up. 18+ · New customers · T&Cs apply. Availability varies by country.
Where this data comes from
- bigtimegaming.com Provider
- bigwinboard.com Slot database
Specs come from the provider's own site and 1 independent slot database. Casinos can run lower-RTP versions, so always check the game rules before you play.
Game artwork © Big Time Gaming, shown to identify the game.
