Castle Builder II Slot: Best Casinos, Free Play, Review
| Released | July 19, 2017 | |
| Slot Studio | Rabcat | |
| RTP ranges! | 97.75/95.5% | |
| Volatility | Medium |
| Theme | Medieval | |
| Reels | 5 | |
| Rows | 3 | |
| Paylines | 15 |
| Bonus Game | Yes | |
| Free Spins | Yes (10-20) | |
| Wild | Yes | |
| Scatter | Yes |
| Multipliers | No | |
| Top Win | x2,000 | |
| Bet Size | 0.10-50 USD/EUR | |
| Hit Freq. | N/A |
Castle Builder II - RTP Analyzer
RTP - 97.75%
Be aware!
RTP of Castle Builder II ranges! There are 97.75/95.5% RTP versions of this slot game!
It means that at some casinos the RTP might be significantly lower than declared 97.75%!
Castle Builder II - Volatility and Required Bankroll Analyzer
Medium Volatility
Provides good balance between the frequency of winnnings and their size. This volatility level can be risky during bad runs, but winnings also can be solid. Great choice for player who don't mind taking risks but don't want it to be too high.
Required Bankroll* (based on our experience)
Aggressive
≈
100 bets
Normal
≈
200 bets
Conservative
≈
400 bets
*Number of bets we recommend for this slot depending on your play style
Castle Builder II - Features Analyzer
Castle Builder II offers 6 out of 32 most popular online slot features
Autoplay
Bonus Game
Free Spins
Wild
Scatter
Multipliers
In-Game Jackpot
Progressive Jackpot
Buy Bonus
Megaways
Gamble Feature
Cascading Reels
Colossal Symbols
Adjustable Paylines
Pays Both Ways
Respin
Expanding Reels
Expanding Wilds
Expanding Symbols
Sticky Wilds
Random Wilds
Multiplier Wild
Walking Wilds
Multiplier Free Spins
Increasing Multipliers
Infinity Reels
Nudging Reels
Cluster Pays
Scatter Pays
Mystery Symbol
Hold Feature
Split Symbols
Castle Builder II In Comparison With Other Slots
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Castle Builder II
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|---|---|---|---|
| Producer | Rabcat | RedTiger | Elk Studios |
| RTP | 97.75% | 96.08% | 94.0% |
| Volatility | Medium | Medium-high | High |
| Max Win | x2,000 | x1,848 | x25,000 |
| Released Year | 2017 | 2019 | 2025 |
| Paylines | 15 | 0 | 4,096 |
| Free Spins | 10-20 | 3-20 | 10-25 |
| Buy Free Spins | x100-x500 | ||
| Multipliers | x2-50 | ||
| Wild Symbol | |||
| Scatter | |||
| Other Features |
Autoplay, Bonus Game, Expanding Wild |
Autoplay, Cascading Reels, Colossal Symbols, Random Wild, Free Spins Multipliers, Nudging Reels, Cluster Pays |
Autoplay, Cascading Reels, Colossal Symbols, Expanding Reels, Sticky Wild, Random Wild |
Comparison Table of All Rabcat Slots (27)
| # Slot Name | RTP % | Volatility | Max Win | Play For Free |
|---|---|---|---|---|
| 1. Castle Builder II | 97.75 % | Medium | x2,000 | N/A |
| 2. Dragon's Myth | 96.6 % | Medium-low | N/A | N/A |
| 3. Forsaken Kingdom | 96.54 % | Medium | x2,500 | N/A |
| 4. Jester Wheel | 96.49 % | High | x2,146 | N/A |
| 5. Tropical Wilds | 96.47 % | Medium | x3,000 | N/A |
| 6. Frozen Diamonds | 96.47 % | Medium | x2,500 | N/A |
| 7. Castle Builder | 96.47 % | Medium-low | x1,000 | N/A |
| 8. Reel of Riches | 96.45 % | High | x2,400 | N/A |
| 9. Star Fever Link&Win | 96.24 % | High | x12,400 | N/A |
| 10. Nikola Tesla's Incr… | 96.22 % | Medium | x4,100 | N/A |
| 11. Anna Van Helsing Mo… | 96.18 % | Medium | x1,500 | N/A |
| 12. Gnome Wood | 96.16 % | Medium-high | x5,000 | N/A |
| 13. North Storm | 96.13 % | Medium | x2,500 | N/A |
| 14. Lion Strike | 96.13 % | Extreme | x14,580 | N/A |
| 15. Mining Fever | 96.13 % | Low | x500 | N/A |
This Page Was Last Updated: May 6, 2026