
One of ELK Studios’ most feature-heavy online slots is Avalon X, which is new for 2025. Our Avalon X review looks at everything the slot has to offer in close detail, covering all its features and payouts. The slot, which has an Arthurian legend theme, has an RTP of 94% and a maximum payout of 10,000x, with its features including free spins, multipliers and mystery boxes.



When the slot game starts the first thing you need to do is actually choose the bonus games you want to activate. There are five bonus games and you can select up to three. I will discuss each bonus game in more detail below. It is important to note that if you choose less than 3 there is a higher probability to trigger the respective bonus game.
The base game mechanics are quite standard, with five reels, three rows, and twenty paylines. The betting range is from £0.20 to £500, with a value of £0.20 for every 0.01 stake/line. The slot also has low-to-medium volatility which varies between 94% — 98% RTP, depending on the bonus games you have selected.
There are several casinos where players can play Rainbow Riches: Pick ’n’ Mix. Below is a list of some best slot sites to choose from.



The Rainbow Riches Pick ’n’ Mix slot has an Irish fantasy world setting. The design allows players to experience the journey of getting the leprechaun gold. The audio also provides the cheerful and exciting ambiance typical of Irish communities. However, it is an old game which was released in 2016 and the age really shows.
The game has a total of twelve symbols, but players can only play with ten symbols max per game. These symbols are the Normal, Wild, and Scatter symbols. The Normal and Wild are payline symbols and the five Scatter symbols trigger the bonus feature. The highest-reward symbol would be the “Rainbow Riches”; getting five provides a 500x multiplier on the stake.

Blue Wolf
0.05x / 0.10x / 0.15x / 0.20x / 0.50x / 1x / 2x / 5x

Green Snake
0.10x / 0.15x / 0.20x / 0.25x / 0.75x / 1.50x / 3x / 7.5x

Purple Eagle
0.15x / 0.20x / 0.25x / 0.30x / 1x / 2x / 4x / 10x

Red Phoenix
0.20x / 0.25x / 0.30x / 0.35x / 1.25x / 2.5x / 5x / 12.5x

Blue Knight
0.30x / 0.40x / 0.50x / 0.60x / 1.50x / 3x / 6x / 15x

Green Knight
0.40x / 0.50x / 0.60x / 0.70x / 2x / 4x / 8x / 20x

Purple Knight
0.50x / 0.60x / 0.70x / 0.80x / 2.50x / 5x / 10x / 25x

Red Knight
1x / 1.25x / 1.50x / 2x / 5x / 10x / 25x / 50x
Like other ELK Studios slots, Avalon X is playable on mobile devices, including both smartphones and tablets. It works the same on mobiles as it does on desktop computers and laptops. The interface is slightly different to better suit smaller devices, but other than that everything is pretty much the same. The slot looks great and plays well whether you access it through a browser-based site or casino app.



Whenever you win, an avalanche takes place. All winning symbols vanish, then a wild appears in one of the empty positions. Symbols then fall from above to fill in all empty spaces, which can create new winning clusters and trigger another avalanche. If there is more than one wild in a winning cluster, they merge to form a multiplier wild.
The slot has a global multiplier that starts at 1x and grows during an avalanche sequence. Each cluster of low-paying animal symbols increases the global multiplier by 1x, while each cluster of high-paying knights increases it by 2x. It resets to 1x when an avalanche sequence ends.
On any spin, the Holy Strike feature can trigger. When it does, it replaces a random number of symbols on the grid with wilds, multiplier wilds or mystery boxes.

Pentagram symbols are mystery boxes. Whenever five or more of them are in view, each one of them reveals a reward. This can be one of the regular paying symbols, wilds or one of four Avalon features.

The four Avalon features are:
Land three scatters and you will earn seven free spins. While using these, the global multiplier does not reset in between spins and mystery boxes stay where they are until they open. If two scatters and a super scatter land, you get to play the Super Bonus Game, where Holy Strike triggers on every spin.
Avalon X is a visually impressive slot with an interesting theme and more than enough gameplay features to make it worth a spin or two. With free spins, mystery boxes, extra-large symbols and multipliers, there is certainly a lot going on. The maximum win of 10,000x is pretty good, though the RTP of 94% lets the slot down a little bit. Having said that, Avalon X is still very much an enjoyable slot that should appeal to those who like feature-heavy online slots.
Rating: 9.0
Here are some common questions about Avalon X.