40 Extra Crown Coin Boost is an online slot from Amusnet that adds a modern coin feature to one of the studio's best known classic lines. The artwork leans fully into royal glamour: a red velvet crown with an ermine trim and a gold fleur-de-lis sits above the title, framed by cherries, grapes, a pink star, an orange, a plum and a bright red seven. The deep crimson background is lit by drifting golden sparks, and the gold lettering of the logo is finished with a small crown on the last word. The overall look is glossy and warm, true to the Extra Crown family rather than a reinvention of it.
The game runs on 5 reels and 4 rows with 40 fixed paylines, which gives it a fuller screen than the old three-row fruit machines while keeping the familiar rhythm of line wins. Spins are quick, symbols are large and easy to read on a phone, and the paytable will be instantly recognisable to anyone who has played Amusnet fruit slots before. On top of that sit a feature built around coins that grow in value, a set of fixed jackpots, a bonus purchase option and the studio's traditional gamble, all of which are explained later in this review.
This slot is aimed at players who like sevens, stars and fruit but want more than a straight line-pays session. It also suits fans of the Coin Boost series looking for a regal version of the formula. Read on to see how the features connect and what the numbers mean for a typical session.
In the base game the 40 fixed paylines on a 5x4 grid do most of the work. Fruits and sevens pay across the lines, and the Wild substitutes for regular symbols and can expand to cover its reel, which is how the bigger line hits are usually formed. The Scatter is independent of the lines and pays anywhere on the screen, so it adds small extra wins even on spins where nothing connects from left to right. Any line win can be taken into the classic Amusnet gamble, where you guess the colour of a card to double the amount or lose it.
The heart of the game is the Coin Boost feature. It can be triggered at any moment and awards five free spins on the same 5x4 grid, where coins land with cash values and can evolve through four grades: Bronze, Silver, Gold and finally Diamond. Each upgrade lifts the value of the coin, so the round builds towards one combined payout at the end rather than paying symbol by symbol. A mystery trigger adds unpredictability, dropping coins onto the reels out of nowhere and starting the feature immediately, even after an otherwise quiet spin. For players who prefer not to wait, the Buy Bonus offers direct access to the feature, while the four-level static jackpot with Mini, Minor, Major and Grand prizes runs alongside everything else as an extra layer of potential rewards.
An RTP of 96.02% places the game slightly above the usual 96% benchmark, which is a fair return for a fruit-based title with a bonus feature and jackpots. The volatility is rated medium-high, and that matches the structure: line wins on 40 paylines keep a steady trickle of small returns, but the larger amounts are concentrated in the Coin Boost round and the jackpot tiers. Expect sessions where the balance drifts down slowly between features and then recovers in a single round.
The maximum win is listed at 1,000 times the bet. That is a modest ceiling for a game with this risk level, and it tells you the math model spreads its value over more frequent mid-sized features rather than one rare explosive hit. In practice, a Coin Boost round with several coins reaching Gold or Diamond is what brings you closest to the top figure. The fixed jackpots give the feature a clear target and make even a short round feel meaningful.
Bets run from 0.40 to 100 per spin, so the slot can be played on a small budget or at higher stakes. The overall experience is that of a polished classic with a stronger bonus layer: familiar symbols, clear rules, and a coin feature that adds tension without turning the game into an all-or-nothing chase. Players who dislike gambling their wins can simply collect and skip the card game.
Had a Coin Boost round where three coins went all the way to Diamond on the last spin. The upgrade animations really build the tension before the payout.
The crown and the red background look great and it feels like the old Extra Crown, just with more going on. Music gets a bit repetitive after an hour though.
Tried the Buy Bonus a few times and the results were mixed but fun. The mystery coin drop that starts the feature out of nowhere is my favourite part.
Plays smoothly on my phone in short sessions and the symbols are big enough to follow. Medium-high volatility means some dead spins before the feature shows up.
Forty lines on a 5x4 grid keep the base game ticking with small hits. The scatter pays help too, and I collect instead of gambling most wins.
Landed the Minor jackpot during my second session, which was a nice surprise. With 96.02% RTP it feels fair for a classic fruit game.
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