Black Hole Protocol

Black Hole Protocol is a space-themed slot by Tieda3.

The slot is built on a 6x6 reel grid with cluster pays and offers a theoretical maximum win of x50,000.

It also comes with special features such as Cluster Pays and Cascading Reels, adding cluster-based hit patterns beyond fixed lines and repeat-win chances from cascading symbol drops.

Specifications

Reel Config

6x6

Paylines

Cluster

RTP

96.05%

Volatility

High

Max Win

50,000x

Bonus Buy

100x

Demo Play

FeatureMatch™

Multiple themes shape the profile

The counts are spread unevenly across several roles, without a single theme or pair taking a clear lead. Free-spin mechanics form part of the bonus-play structure. Payout-related mechanics add ways to enhance reward values.

Feature richness

Several special features sit alongside the core format, adding mechanical variety within a moderately sized feature set.

Feature mechanics: 6
Feature families: 4

Feature profile

Select a role to explore its contributing features.

Number of features contributing to each role. One feature can contribute to several roles.

How we analyze this game’s features

Each bar counts the features that contribute to a functional role. One feature can contribute to more than one role. Bar lengths are scaled to the largest count within this game; compare the numbers when looking across games.

These counts describe feature composition. They are not win probabilities, payout contributions, or quality ratings.

All features 8

Cluster Pays Cascading Reels Cascade Multiplier Standard Scatter Selectable Free Spins Unlimited Retrigger Bonus Buy Accumulating Multiplier

Highlight Features

Cluster Pays

The Cluster Pays system is an innovative winning method that completely breaks the traditional slot concept of 'lines'. In a typical slot, symbols must be placed sequentially from the left on a designated payline to be considered a win. However, in the Cluster Pays method, there are no lines at all. Instead, symbols like candies or jellies cascade down onto a large grid (usually 5x5 or larger). There is only one condition for a win: identical symbols must connect horizontally or vertically to form a cluster.

Unlimited Retrigger

An Unlimited Retrigger means that the 'retrigger' feature—which allows winning additional free spins by landing scatter symbols again during a free spins bonus—has no limit on the number of times it can occur. In theory, this means that if luck is on your side, the free spins can continue indefinitely, making it one of the most powerful and attractive potentials a slot can have.

Bonus Buy Price Comparison

Price x100

Average Bonus Buy Price

This slot's bonus buy price sits within the usual range for comparable slots. Buying the feature can be a reasonable option if your goal is to reach the free-spin round without waiting for a natural trigger. The trade-off is that you skip the base-game spins that would normally happen before the feature, including any wins or volatility from that part of play.

Avg. Min x81.6Avg. Max x129.1

LowExpectedHigh

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.