Fu Double Luck Diamond Explosion continues RubyPlay’s Diamond Explosion series, applying the same core mechanics to a new visual setting — this time inspired by traditional Chinese symbolism. The game demonstrates RubyPlay’s recent strategy: building multiple titles around a stable mechanical framework, while adapting themes, visuals, and minor parameters for different markets.

Core Diamond Explosion Mechanic

At the heart of the game is the familiar Diamond Explosion feature, a variation of the Hold & Spin mechanic. During an explosion phase, adjacent prize symbols merge into larger clusters, creating layered wins and nested bonus outcomes.

As in other games from the series:

• small clusters pay fixed amounts;
larger clusters trigger internal spins with random multipliers;
the largest clusters can award one of four fixed jackpots.

This mechanic defines both the pacing and the payout structure of the slot.

Slot Overview

Fu Double Luck Diamond Explosion is a 5-reel × 3-row video slot with 50 fixed paylines.

• RTP: 96.33%
• Volatility: medium–high
• Hit frequency: 53.25%
• Maximum win: x8000 bet

Compared to Diamond Explosion 7s, this version offers a slightly higher hit frequency, while maintaining the same maximum win potential.

Visual Style and Theme

The game is rendered in a classic Chinese aesthetic, with crisp, polished symbols and strong visual contrast. While the underlying mechanics remain unchanged, all standard symbols — including scatters and regular icons — are redesigned to fit the theme.

One notable visual difference is the jackpot layout: the four jackpots are displayed above the reels in reverse order compared to Diamond Explosion 7s. The Grand jackpot appears on the far left, while the Mini jackpot is shown on the right.

Free Games and Buy Feature

Fu Double Luck Diamond Explosion introduces a Buy Feature, allowing players to purchase free games for 100× their total bet.

Triggering free games (either naturally or via purchase) requires four Prize + Wild symbols, which award 8 free spins.

During free spins:

• one reel is randomly selected and filled entirely with Wild / Prize symbols;
• these symbols are sticky and interact directly with the Hold & Spin logic;
• this setup dramatically increases the chance of forming large symbol clusters.

Explosion Free Games Inside Free Games

A defining characteristic of the Diamond Explosion series is the presence of nested bonus layers. In Fu Double Luck Diamond Explosion, players can trigger Explosion Free Games inside an ongoing free spins session.

This happens when Prize symbols and Prize + Wild symbols combine and freeze across reels, effectively creating a massive merged symbol structure.

In one observed session:

• a colossal symbol spanning four reels and eight symbols appeared;
• later, an even larger cluster formed, spanning all reels with ten merged symbols;
• this colossal symbol triggered an internal spin and awarded €60 on a €1 bet.

These large clusters are resolved only after interaction — the player presses to spin within the cluster, revealing the final win.

Two Layers of Free Games

Effectively, the game operates with two types of free games:

• standard free spins with a random Wild reel;
• Explosion Free Games, triggered when Prize symbols merge into large frozen clusters.

It is possible to trigger multiple Explosion Free Games within a single free spins session, significantly increasing win potential and extending engagement.

Final Thoughts

Fu Double Luck Diamond Explosion is a clear example of RubyPlay’s series-driven design philosophy. Mechanically, it closely mirrors Diamond Explosion 7s, but wraps the feature set in a culturally distinct visual package and adds a Buy Feature for faster access to volatility.

The game does not aim to reinvent the Diamond Explosion mechanic, but rather to refine and redistribute it across themes and markets. For players who enjoy layered bonus structures, expanding symbols, and nested free games, this title delivers a familiar yet polished experience.