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Coin UP Volcano by 3 Oaks Gaming is a volcanic-themed slot built around a HOLD and WIN bonus structure. The base game uses a 4x3 grid, while four symbols on an active line can trigger the bonus feature. During the round, the play area expands to 4x6 as locked positions are opened, with Bonus Symbols carrying fixed Mini, Minor, Major, Grand and Royal jackpot values.
The game includes Mystery Symbols, Mystery Jackpot Symbols and a Coin Collect Symbol that gathers the values of active Bonus Symbols. In the Bonus Game, an Up Row appears above the reels with modifiers such as Reel Up, Mystery Up, Multi Up and Coin Up. These can unlock cells, turn mystery symbols into jackpots, add multipliers or increase cash values. Super versions apply their effect across all reels.
This demo version lets players play for free and practice before playing for real money. Coin UP Volcano also features sticky coins, respins, and a Bonus Shop with entry options for three bonus game types, making the slot focused on expansion, locked cells and jackpot collection.
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