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Dr Brainfart

Slotmill
Dr Brainfart

Dr Brainfart is a mad scientist-themed slot by Slotmill.

The slot is built on a 6x6 reel grid with pay-anywhere wins and offers a theoretical maximum win of x15,000.

It also comes with special features such as Pay Anywhere and Cluster Pays, adding more flexible win positions across the grid and cluster-based hit patterns beyond fixed lines.

Specifications

Reel Config

6x6

Paylines

Anywhere

RTP

96.07%

Volatility

-

Max Win

15,000x

Bonus Buy

100x

Demo Play

Dr Brainfart by Slotmill

FeatureMatch™

A varied feature profile

The mechanics cover several roles with similar representation instead of concentrating heavily on one. Part of the combination-forming role is carried by reel-related mechanics. The payout-related family contributes to increases in reward values.

Feature richness

A mid-sized feature set adds several mechanical layers to the core spin-and-win format, offering a moderate range of special systems to explore.

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 11

Pay AnywhereCluster PaysCascading ReelsCascade MultiplierColossal ReelsSymbol ModifierMulti-Mode Free SpinsMulti-Type ScattersAccumulating MultiplierAnte BetBonus Buy

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.

Accumulating Multiplier

An Accumulating Multiplier is a powerful system, primarily used in bonus rounds like free spins. The core of this feature is that the multiplier applied to winnings does not reset with each spin; instead, it is maintained or continuously increases until the bonus round ends. Its goal is to create anticipation for exponentially larger payouts as the round progresses, providing players with maximum tension and thrill.

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

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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.

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