4 Pirate Chests is a pirate-themed ways slot from 4ThePlayer. Skull Coins feed treasure chests above the reels, with the BOOMPOTS feature determining when a chest award occurs. Chests above reels three to five can start Mystery Pirate Pays, adding mystery symbols to the reels. The chest above reel two instead opens Pirate Plunder Free Spins, where pirate symbols change appearance and chest features occur more frequently. The game also advertises separate purchases for free spins and a five-reel mystery feature. A chest filling visually should not be treated as a promise that the next spin will trigger it.
To compare related slots formats, read the rules of 5 Flaming Dollars and 3 Coin Volcanoes.
The library also explains the difference between lines, ways and clusters to help put these mechanics in context.
Source: published game information.
