Derby King

Game Overview

Saddle up for a thrilling ride with Derby King, the latest high-octane slot from JDB​ (JDB老虎机). This game throws you into the glamorous world of horse racing, where strategy meets chance in a quest for glory and massive multipliers.

The core of Derby King lies in its innovative Frame Collection​ mechanic and a lucrative Free Spins​ feature with escalating multipliers. As you spin through the 5×4 reels, your goal is to land ZP symbols to activate Frames, which then transform into Wilds, triggering chain reactions. The excitement builds as you chase the 10,000x max win, making every race a potential jackpot!

Key Game Attributes

• Theme:​ Horse Racing / Equestrian / Luxury
• Reels & Rows:​ 5 reels, 4 rows
• Paylines:​ 20 fixed bet lines
• Max Win:​ 10,000x
• Key Features:​ Frame Collection, Free Spins with Multiplier Progression, Wild Symbol Chain Reactions.

Game Mechanics & Features

Frame Collection & Wild Chain Reactions

This is the heart of Derby King.

• ZP Symbols:​ When a ZP symbol lands on a reel position without a Frame, it adds a Frame to that spot.
• Transformation:​ Once a Frame is activated (after subsequent spins), it turns into a Wild symbol.
• Spreading Effect:​ If newly created Wilds are adjacent to other Frames, those Frames also turn into Wilds. This cascading effect continues until the entire board is filled with Wilds or no more conversions occur.

Free Spins Feature

Trigger this high-stakes feature by landing 3 Scatter symbols​ anywhere on the reels.

• Multiplier Meter:​ Before the free spins begin, you can accumulate points in the “Multiplier Meter” during the main game to boost your starting multiplier.
• Escalating Multipliers:​ The multiplier increases with each spin based on the meter level (ranging from x1 to x100).
• Standard Trigger:​ If triggered without a pre-accumulated multiplier, the feature starts with the current meter level locked in.
• Automatic Trigger:​ If the multiplier reaches the maximum x100, the feature triggers immediately.

Full Screen Bonus

When all positions on the reels are filled with special multiplier symbols during Free Spins, the Full Screen Bonus is activated. You get to select a final multiplier (x2 to x10), granting you a massive instant reward.

Wild Symbols

Wilds substitute for all symbols except Scatters. They appear on reels 2, 3, and 4, and are the key to triggering the Frame Collection feature.