Mancala Gaming has released Clover Vault: Progressive JP, a leprechaun-themed online slot that combines a Hold & Win-style bonus with a jackpot structure led by progressive Major and Grand prizes. The game carries a maximum win of 50,000x the bet and uses its central leprechaun character throughout the coin-focused gameplay.
Clover Vault: Progressive JP launched on September 15, 2026. It uses a 5x3 grid with no conventional paylines, while the listed volatility stands at 4 out of 5, classified as high. The game has a 12.5% hit rate. Winnings come through the Bonus Game or the Claim Win feature rather than standard payline combinations.
A 5x3 Slot Built Around Feature Wins
The Claim Win feature operates during the base game and can appear in any grid position. Once triggered, it awards between three and five re-spins on a single spin state. During those re-spins, the feature continues collecting values from its position until its counter reaches zero.
At the end of the sequence, the game pays a percentage of the accumulated value. Possible percentages include 10%, 20%, 30%, 40% and 50%. Higher outcomes can reach 100% or 200% of the total collected amount.
Several special symbols add further ways to build prizes. Two Surprise symbol types can appear in both the base game and Bonus Game. They remain unchanged during regular play, while the Bonus Game converts them into special prizes when the feature ends. A regular Surprise symbol can become a Coin or Collector symbol. It may also transform into either a Mini or Minor Jackpot.
The Surprise Jackpot symbol has a jackpot-focused set of possible transformations. It can become a Mini or Minor Jackpot, while the Major Jackpot is another possible result.
Collector symbols can also appear in either game mode. During the Bonus Game, a Collector gathers the values of existing Coin symbols across the grid, excluding Jackpot symbols. The game then applies a random multiplier ranging from x1 to x20 to the collected amount. Coins remain on the grid after the collection takes place, allowing them to stay active within the feature.
Hold & Win Bonus Expands the Prize Grid
Players enter the Bonus Game when any five symbols land across the middle row. The feature begins with three respins. Each new symbol that lands resets the respin counter to three, keeping the round active while additional symbols continue to appear.
The Bonus Game finishes when the player runs out of respins or fills the complete 15-position grid. This mechanic forms the core Hold & Win experience referenced in the game’s launch material.
A Multiplier symbol appears exclusively during the Bonus Game. When it lands, it doubles the values shown on Coin symbols and then disappears from the grid. The Multiplier cannot trigger the Grand Jackpot.
Jackpot symbols can appear in any grid position during regular play as well as during the bonus. In the base game, the game pays Mini and Minor Jackpots only when their symbols appear within the Claim Win sector. The Bonus Game makes every jackpot type available. Players can also land multiple jackpots of the same type during a single bonus round, with the Grand Jackpot serving as the exception.
Major and Grand Jackpots Grow With Bets
Clover Vault: Progressive JP includes four jackpot levels. Mini and Minor carry fixed values, so their prize amounts do not increase through wagering. Major and Grand work as progressive jackpots, with each bet adding to their respective totals until a win occurs. Players can win the progressive jackpots during the Bonus Game.
The Grand represents the game’s highest jackpot prize. Filling all 15 grid positions with symbols of any type awards it. When the Grand triggers, the player forfeits the other prizes currently displayed on the grid.
The combination of the Claim Win mechanic and Hold & Win Bonus gives the release its main gameplay structure, while the progressive component places the Major and Grand prizes at the center of the jackpot system. With a stated maximum payout of 50,000x the bet, Clover Vault: Progressive JP adds another feature-driven slot to the developer’s portfolio.
Source:
New Game Release: Clover Vault: Progressive JP ☘️ by Mancala Gaming, Press Release
