Witness astronomical wonders filled with directional wilds, mystery symbols and free spins in Betsoft’s Expansion!
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Expansion! ticks all the boxes with fantastic presentation and captivating features, even if its medium level of volatility might deter more hardcore players.


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100% up to €300 + 25 Free Spins on Book of Dead

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  • Thumbs-Up Original theme and high-quality visuals
  • Thumbs-Up Directional wilds with free spins boost
  • Thumbs-Up Free spins bonus with wild multipliers
  • Thumbs-Down Some versions may have lower RTP

Expansion! Slot Review

Betsoft never ceases to amaze, pushing for innovation across both video slot themes and gameplay. Expansion! delves into the world of astronomy, with a stargazing backdrop that introduces us to all kinds of mysterious planets. Betsoft’s presentation is always on point, with high-quality visuals and engrossing animations. You’re also treated to a handful of innovative video slot features, particularly the directional wilds mechanic that gets an added boost during free spins.

You’ll even get to pick some mystery symbols and can opt for a buy feature that will have you skipping the queue and jumping straight into the bonus segment. But, are strong visuals and innovative features enough to get this medially volatile slot off the ground? Read our full review below to help you decide.

SLOT FEATURES Directional wilds, scatter symbols, free spins, mystery symbols, buy feature
RELEASE DATE 22/02.2023
SLOT TYPE Video Slot
THEME Astronomy
BET LEVELS 0.3/300
RETURN TO PLAYER 92.10% | 94.02% | 96.08%

Expansion! Bonus Features

Betsoft likes to get creative with its video slot features. The provider maintains its streak of originality in Expansion!, particularly through the directional wilds mechanic. We’ll tell you more about it below, but the feature can be triggered on any base game spin, with an overcharged version awaiting players in the bonus rounds. This holistic approach creates a sense of progression, where features and mechanics connect and amplify their offerings. They’ll hopefully bring you closer to the 2,171x maximum win feature, which isn’t too hard to close in on, given the slot’s medium volatility rating which should see a nice variety of wins on the reels.

All in all, Expansion! comes with a satisfying set of features, giving you plenty to look forward to across both the base game and free spins.


As per usual, wild symbols step in for any missing pay symbols that would otherwise complete a winning combination. They’re nifty little tokens you’ll quickly learn to relish, but in Expansion!, these symbols take on an even more exciting format. These aptly named directional wilds spin whenever they land, firing their ray gun in one of 8 possible directions. The ray turns all the symbols it touches into extra wilds, increasing your odds of putting together bigger and better winning combinations. The directional wilds only land on reels 2, 3 and 4 and get a substantial upgrade during the free spins bonus.

Mystery Symbols

Landing as stacked symbols, Mystery symbols flip to reveal a set of matching pay symbols that can very easily complete a winning combination.

Scatter Symbol

Your way into free spins, scatter symbols are represented by a red planet and you’ll need a minimum of 3 tokens to activate the bonus rounds. To be precise, 3, 4 or 5 scatter symbols give you 8, 12 or 15 free spins, respectively.

Free Spins

Expansion!’s bonus round takes your game to the next level, upgrading existing mechanics and increasing your odds of claiming the 2,171x maximum win. The biggest change comes through win multipliers that can give away 2x, 3x, 4x, 5x, 8x and even 10x boosts. Additionally, directional wilds get their very own upgrade, firing twice in succession and adding even more extra wilds to your reels.

Buy Feature

If you’re keen on playing the bonus round without wanting to wait for the right scatter symbols to fall into place, you’ll want to have a look at the buy feature. For 60x, 90x or 113x your selected bet, you get 8, 12 or 15 free spins, respectively.

Expansion! Jackpot

There is no dedicated jackpot prize in Expansion! The biggest haul you can hope for is the game’s maximum win of 2,717x your selected bet.

RTP & Volatility

Expansion! dials down the tempo, delivering a more forgiving medium level ofvolatility. The result is more frequent wins, even if they aren’t as rewarding as those found in titles with higher levels of volatility.

On the other hand, the regular return to player rate sits at 96.08%, although you can also find iterations of the game with a reduced 94.02% and 92.10%. Be sure to check what version of the game you’re playing before placing any real money bets. If you’re looking for some even better odds, explore other best RTP online slots we have on our list.

Where to Play Expansion!

Betsoft’s impressive library of games can be enjoyed at a variety of top online casinos, so you’ll have no trouble finding a place to play Evolution! Even so, we recommend playing it over at Mr Green, where you can also claim a welcome bonus with up to 50 free spins.

Expansion! on Mobile

Hoping to gaze at the stars while you’re on the move? Expansion!’s mobile optimization allows you to enjoy it on both Android and iOS systems. The game can be accessed on your favourite mobile devices through your mobile browser.

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Leanna Madden is an expert in online slots, specializing in analyzing game providers and evaluating the quality and variety of slot games. With her extensive knowledge, she guides players to the best slot options, including high RTP slots and those with exciting bonus features. Leanna's insights help players make informed decisions and enjoy rewarding slot experiences at online casinos.

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