Coin UP Volcano
3 Oaks Gaming
Coin UP Volcano is a volcano and coin-themed slot by 3 Oaks Gaming.
The slot is built around a 5x3 reel grid.
It also comes with special features such as Bonus-Only Payout and Hold and Respin, adding a concentrated bonus-only payout loop and locked-symbol bonus tension.
Specifications
Characteristic
PREVIEW
User Rating
-
Free Spin
Preview
Jackpot
None
Reel Config
5x3
Paylines
Etc.
RTP
-
Volatility
-
Max Win
-
Bonus Buy
30x
Demo Play
Coin UP Volcano by 3 Oaks Gaming
Coin UP Volcano by 3 Oaks Gaming
Bonus Buy Efficiency
Bonus Buy Analysis
Low Bonus Buy Price
This slot's bonus buy price is below the usual range for comparable slots. That makes buying the feature relatively accessible, especially if you want to try the free-spin round directly. Keep in mind that some games offer multiple free-spin tiers, and SlotWise uses the lowest available buy price as the reference. A lower price may also mean that the free-spin feature itself carries a lighter payout profile than higher-priced games.
Special Features
Spins
Hold and Respin
Pays
Bonus-Only Payout
Free Spin
Retrigger
Reels
Auxiliary Triggered Reel
Symbols
Persistent Symbol
Symbols
Instant Prize Symbol
Jackpot
Fixed Jackpot
Feature
Blocker Removal
Symbols
Mystery Symbol
Symbols
Symbol Upgrade
Symbols
Symbol Modifier
Pays
Accumulating Multiplier
Pays
Global Multiplier
Symbols
Symbol Converter
Betting
Bonus Buy
Betting
Selectable Hold & Win Modes
Feature Highlight: Hold and Respin
Hold and Respin, or 'Hold & Win', is one of the most popular core bonus game mechanics in modern slots. The essence of this feature, unlike traditional free spins, is to 'Hold' bonus symbols on the reels and 'Respin' the remaining empty spaces to fill up the screen. This system was popularized worldwide through 'Money Train 2's' 'Money Cart Bonus' and is the foundation for numerous developer-specific brand features like Wazdan's 'Hold the Jackpot™' and Playtech's 'Fire Blaze™'.
Feature Demo
Feature Highlight: Bonus-Only Payout
Bonus-Only Payout is a highly experimental and unique payout system that completely flips the traditional rules of slots. This method does not pay out any winnings for any symbol combination in the base game (regular spins). The core of this feature is to condense all of the player's goals and expectations into one single moment: 'entering the bonus game'. The base game only serves as a 'raffle for an entry ticket' to the bonus; the only path to winning prizes is the bonus game itself.
Feature Demo
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About Previews
Previews focus on playable demo access, slot specifications, and feature structure before a full 300SPINS™ review is available. They are designed to make the slot easy to inspect and compare, while leaving performance judgments based on actual play sessions to full 300SPINS™ reviews.