Slots Like Castle Builder: 96.47% RTP Alternatives Worth a Spin

If you like Castle Builder, slots like Heart Of The Jungle and Maid Marian are worth a spin. Developed by Microgaming, Castle Builder has an RTP of 96.47% across a 5-by-3 grid with 15 paylines. If you like Castle Builder, slots like Heart Of The Jungle, Maid Marian and Jungle Spirit Call Of The Wild are worth a spin. Its main features are improving symbols. Expect a Medium-High RTP and low volatility. Theme-wise it covers Gems and Castles.

Castle Builder casinos

Play Castle Builder slot game at these top casinos.

Reviewed by Paul Stone
Published: December 2020

Games like Castle Builder

Castle Builder has some top matching online slot games based on game style, game features and bonus features, they include Heart Of The Jungle, Maid Marian, Jungle Spirit Call Of The Wild and Jungle Wild.

 

Heart Of The Jungle is a Wild slot from Ash Gaming. The reels form a 5×3 layout offering 50 paylines. On return it edges out Castle Builder, which runs 96.47%. Expect medium-low volatility here, so smaller wins come around often, so the balance moves more smoothly. Headline features include free spins, progressive jackpot and increasing multipliers. In play that shows up as crystal falls free spins. Stakes run from 0.01 up to 50 a spin, so it suits both small and larger budgets. Return to player sits at 96.98%, which is high for the market. Treat it as a guide to long-run payback rather than a promise for any one session. It also draws comparisons with Jungle Jump. Pick it over Castle Builder when you want a steadier, lower-risk session.

 

Maid Marian is a slot built by Inspired Gaming. It is played across a 5-reel, 4-row grid with 20 paylines. Stakes run from 0.2 up to 60 a spin, so it suits both small and larger budgets. The feature set covers free spins, sticky wilds, autoplay and increasing multipliers. In play that shows up as locked spins. On return it gives back slightly less than Castle Builder, which runs 96.47%. It plays at medium-low volatility, which means wins land fairly regularly and tend to be modest, which keeps sessions steady. The RTP is 95.00%, placing it in the medium bracket. That figure is a long-term average rather than something to expect back each session. Fans often line it up alongside Tarzan. Fans of Castle Builder should find plenty to like here.

 

Jungle Spirit Call Of The Wild is a Spiritual-themed release from NetEnt. It is played across a 5×3 grid with 243 ways to win. On RTP it is line-ball with Castle Builder. Headline features include free spins and expanding wilds. Specific touches include 678 times your stake, symbol expansion feature, 1 of 5 free spins animals and 024 ways to win. The RTP is 96.47%, which is medium-high for the market. That figure is a long-term average rather than something to expect back each session. You can bet from 0.2 to 100 per spin, leaving room for cautious and bigger play alike. Expect very high volatility here, so wins are rarer but can be large, so the balance tends to swing hard and patience helps. Fans often line it up alongside Jungle Goals. Fans of Castle Builder should find plenty to like here.

 

Jungle Wild is a Wild slot from WMS. The reels form a 5-reel, 3-row layout offering 25 paylines. It plays at high volatility, which means the pace favours larger, less frequent wins, so sessions can run hot and cold. Bets start at 0.01 and reach 90 a spin, covering most bankrolls. Return to player sits at 95.10%, placing it in the medium bracket. As ever, that is a theoretical average measured over a huge number of spins, so short sessions vary. It brings scatter symbols. That sits a touch below Castle Builder, which runs 96.47%. It is frequently grouped with Nrvna. Fans of Castle Builder should find plenty to like here.

Games worth a spin if you like Castle Builder

Castle Builder is firstly an Castle themed game with some references to Gems themes.

Popular Castle themed slots

Castle Builder is a Castle themed slot game. Similar Castle themed slots include Wicked Riches, Winnings Of Oz, Caishens Cash and Vlads Castle.

More slots like Castle Builder, by Microgaming

Castle Builder comes from Microgaming. Immortal Romance (2011), with its four-character free-spins system, is still in casinos worldwide. Among its best-known slots are Immortal Romance, Thunderstruck II and the record-breaking Mega Moolah. It is widely credited with writing the world’s first true online casino software that same year. More Microgaming slots sit just below if you want to keep exploring.

The leading Microgaming online slots to play, these online slots are all developed by the same developer as Castle Builder, they are Cabin Fever, Riviera Riches, The Phantom Of The Opera and Bust The Bank.

Castle Builder key information 2026

Here are all the key statistics for Castle Builder slot.

Castle Builder screenshot

Slots that share features with Castle Builder

Castle Builder has bonus features including: Improving Symbols.

Online slots with Improving Symbols

The best matching slots with Improving Symbols are Vampire Killer, Icy Wilds, Megajackpots Wheel Of Fortune On Air and The Monkey Prince.

Castle Builder slot sites FAQs

Castle Builder Pros and Cons

A quick look at the main pros and cons of Castle Builder, based on its RTP, volatility, features, ranking and gameplay.

Pros

• Features improving symbols for building wins
• Low variance keeps the reels ticking over for a smaller budget
• A respectable 3,000x max win
• A healthy 96.47% RTP, a touch above the norm

Cons

• No progressive jackpot on offer
• A fairly light feature set
• Don’t expect huge swings with low variance
• No dedicated free spins round listed