Systems and methods for slot-style games

A method, comprising:

• determining, by a processing device, a three-dimensional array of reel symbols for a slot-style game, the array comprising, for each layer of depth in the array, a two-dimensional reel symbol matrix, each reel symbol in each matrix being identifiable by a particular two-dimensional position, wherein a first two-dimensional matrix is populated with reel symbols based on a first Return-To-Player (RTP) probability and a second two-dimensional matrix is populated with reel symbols based on a second RTP probability different than the first RTP probability, wherein the second RTP probability is higher than the first RTP probability;
• determining, by the processing device and based on a reel symbol removal mechanic, a first reel symbol to remove from the first two-dimensional matrix of the three-dimensional array;
• determining, by the processing device, a second reel symbol from the second two-dimensional matrix of the three-dimensional array, the second reel symbol having the same two-dimensional position as the first reel symbol;
• and
• causing, by the processing device, the second reel symbol to replace the first reel symbol.