Highlights
- 7 features and 3 free spins bonuses
- Can combine 3 different features at once
- Attractive slot with great graphics
Contents
Introduction
This free slot will transport you to Australia’s Kalgoorlie Mine, where you can discover a trio of secret mines as you spin on a 5x3 grid with 25 paylines and 3 free spins features.
There is also a Reel Expand bonus which sees your grid increase by 2 rows and the number of paylines double, along with the Gem Coins feature offering instant wins and extra spins and a Diamond Wins bonus that can deliver more prizes and bonus games.
How to Play
Land winning combinations when three or more matching symbols appear on the same payline starting on the leftmost reel.
The truck full of gold is the highest-paying standard symbol and offers wins for 2 to 5 symbols. The rest of the symbols need you to land at least 3 for a prize.
The top available 5-of-a-kind wins are:
- Gold truck 500x
- Boomerang Jack 250x
- Alligator 250x
- Kangaroo 200x
- Koala 200x
Wilds
These can appear on the last 4 reels and can substitute for any icons except for the bonus symbols. Read about these next in this slot review.
Theme and Graphics
This Red Rake slot combines a mining theme with Australian animals. The graphics are great, and the mine sounds really add to the atmosphere of the game.
Boomerang Jack’s Lost Mines
Boomerang Jack’s Lost Mines RTP and Variance
The theoretical return to player rate of this slot is 95.3%. It is a medium to high variance choice of online slots.
Top Nature Slots
Boomerang Jack’s Lost Mines Bonus Features
You can uncover lots of bonuses in these Lost Mines, including:
Gem Symbols
There are green, red, and blue gem symbols. Land one anywhere on the grid, and you could randomly trigger a free spins bonus. You might even unlock 2 or 3 features at once. Read on in this slot review for more information on this.
Gem Coins
You can trigger the Gem Coins feature by landing at least one of the green gem coins anywhere on the grid in the base game. Each gold coin that lands during the feature will award a win, and the coin will start out being worth twice your bet.
You will start with 5 free spins, and the value of the coin will go up with each green gem coin you land in the feature. You will also get an extra free spin.
Diamond Wins
Land at least 1 red diamond coin, and you will get 8 free spins. Every treasure chest icon that lands can give you an instant win, extra spins, or one of 4 different coloured diamonds that can reward you with one of the 4 jackpots displayed above the reels.
Each different coloured diamond you land will fit into a slot on the jackpot counter, and when these are filled, you win the corresponding prize.
Reel Expand
If you get one of the blue gem coin symbols, you will get 5 free spins and trigger the Reel Expand bonus.
Combines Features
Land more than one of different coloured gem coins and enjoy more than one feature at once. Land 2 gems for 8 free spins with the associated features, or land one of each gem for 10 free spins, with all of the benefits for each one of the bonuses.
| Slot Name: | Boomerang Jack’s Lost Mines |
|---|---|
| Software: | Red Rake Gaming |
| RTP: | 95.3% |
| Volatility: | Medium/High |
| Paylines: | 25 |
| Reels: | 5 |
| Min Bet (all lines covered): | £0.10 (GBP) |
| Max Bet: | £5 (GBP) |
| Top Win: | 4836 |
| Features: | Wild Symbol, Scatter Symbol, Free Spins, 5 Reels, Reel Modifiers, Medium/High |
| Themes: | Gold, Mining |
| Last Update: | 29/06/2026 |
Available in UK?
|
Yes. Red Rake Gaming have a UKGC license and are allowed to offer their games at UK licensed casinos. |
FAQs
What is RTP of the Boomerang Jack’s Lost Mines slot?
The theoretical return to player is 95.3%.
What is the variance of the Boomerang Jack’s Lost Mines slot?
This is a medium to high-variance game.
Does Boomerang Jack’s Lost Mines have a free spins bonus round?
There are 3 different free spins bonuses in this game. These offer different features and varying numbers of free spins. Read the main slot review to find out more.
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| Slot Name: | Boomerang Jack’s Lost Mines |
|---|---|
| Software: | Red Rake Gaming |
| RTP: | 95.3% |
| Volatility: | Medium/High |
| Paylines: | 25 |
| Reels: | 5 |
| Min Bet (all lines covered): | £0.10 (GBP) |
| Max Bet: | £5 (GBP) |
| Top Win: | 4836 |
| Features: | Wild Symbol, Scatter Symbol, Free Spins, 5 Reels, Reel Modifiers, Medium/High |
| Themes: | Gold, Mining |
| Last Update: | 29/06/2026 |
|
Available in UK?
|
Yes. Red Rake Gaming have a UKGC license and are allowed to offer their games at UK licensed casinos. |
