100 Extra Crown Coin Boost by Amusnet pairs royal crowns with collectible coins on five reels and four rows. Ordinary spins use 100 fixed paylines, while Coin Boost shifts attention toward improving cash coins. Its main attraction is that a developing feature can gain value through upgrades as well as additional spins.
Quick take: Expanding crowns handle the line wins, while Coin Boost gives existing coins room to improve.
Theme and Gameplay
Crowns and coins give the game two clear things to watch. On ordinary spins, matching combinations follow the fixed paylines, while Star Scatters pay anywhere. With four rows and a hundred lines, judging a result means looking beyond one obvious horizontal match.
The Crown Wild expands on reels two, three and four, helping complete combinations across the taller layout. It substitutes for eligible symbols, excluding Dollar and Star Scatter symbols. That makes an expanded crown useful for the line game without turning it into a replacement for every special symbol.
Slot Features
Coin Boost can activate with at least one coin present and begins with five spins. A Mystery Trigger can also add coins and start the feature immediately. One visible coin therefore creates a possible feature opening, rather than guaranteeing entry by itself.
Once the feature is underway, Upgrade symbols raise existing coins through Bronze, Silver, Gold and Diamond levels. The important change is to prizes already on the board: another upgrade can make the current collection more valuable instead of simply adding a separate amount.
Plus Spins coins extend the round before becoming Bronze cash coins themselves. They contribute both more time and another cash value. Filling the grid doubles the feature winnings, giving a complete board an additional reward beyond the collected coins. Coin Boost also has a purchase option for direct entry.
Feature focus: A Plus Spins coin does two jobs: it adds turns, then becomes a Bronze cash coin that can benefit from later upgrades.
RTP and Win Potential
The listed RTP is 96.02%, a theoretical return across extended play rather than a prediction for a single visit. Within Coin Boost, the full-grid reward doubles feature winnings; it applies to that completed-board result and should not be read as a multiplier on every bonus.
My Thoughts On This Slot
The strongest part of this design is the way extra time and coin upgrades work toward the same goal. An additional turn matters because it leaves another opportunity to improve what is already present. The Bronze-to-Diamond ladder gives that improvement an easy sequence to follow.
The hundred-line base game may feel busy to someone who prefers a small set of obvious winning routes. Its expanding crowns provide a useful focal point, though, and the bonus offers a different kind of attention: watching coin levels rather than tracing combinations. This suits someone who enjoys a cash feature with several ways for a developing board to become more valuable.
Final Take: A crown-and-coin game whose best idea is giving collected prizes more room to grow.
