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My file structure is as follows:

Main/
Games/ 
 roulette.rb
casino.rb
wallet.rb
player.rb

I have a wallet class that holds a money value in the class like so.

class Wallet
 attr_accessor :money
 def initialize
 @money = 0
 end
end

I then have a player class that inherits from the Wallet class

class Player < Wallet

 attr_accessor :name
 def initialize
 super()
 @name = nil
 get_user_info
 end

I then have a Casino class that inherits from Player like so

class Casino < Player
 def initialize
 binding.pry
 puts @money, @name
 end

I have also used require_relative to pull in both files thinking that would give me access to their global variables @money, @name.

If I am inside the roulette.rb file here is my code I wrote just to see if it would have a value.

require_relative '../wallet.rb'

class Roulette
 def initialize
 puts @wallet
 end
end

How would I go about getting access to these variables in the casino class? Thanks for the help.

Those are not global variables. They are called "instance variables" and to access them you need to create instances of your casinos and players. Looks like this.

player = Player.new
player.money # => 0
player.money += 10
player.money # => 10

In your Casino class you don't call parent initializers (a simple oversight, I think), so it doesn't initialize @name and @money.

And Roulette doesn't do anything at all to obtain a wallet. So it stays at default value nil.