Zhang Gu is an Asian-themed slot game developed by GMW. The game features a 5-reel layout with 3125 ways to win, which are fixed at a cost of 75 credits. The game incorporates Chinese cultural elements, though specific details about the theme are not provided in the rules.
The slot includes several special features. The Wild symbol appears on reels 2 and 4 only and substitutes for all symbols except the Scatter. The Scatter symbol triggers the Free Games Feature when it appears three or more times in a combination. This awards 15 free games, during which symbols are stacked on reels 2 and 4. Additional symbols are also stacked during the free games, and the feature can be retriggered.
Zhang Gu also offers a Double Up Feature, allowing players to potentially double their winnings after a win. This feature presents five cards, with players choosing one to beat the dealer's card. Players can double up to five times or until they lose.
A unique aspect of Zhang Gu is its 3 Levels Jackpot Link. This progressive jackpot system includes three levels: Super Jackpot, Major, and Minor. These jackpots can be randomly awarded on any paid spin, with higher bets increasing the chances of winning. Multiple jackpot levels can be won in a single spin, but they cannot be awarded during the Free Games Feature.
Winning combinations in Zhang Gu pay through any position on the bought reels and the center line on other reels. All symbols pay when they appear consecutively from left to right, starting from reel 1, except for the Scatter which pays in any position.