steamspy-ruby 
A Ruby interface to the SteamSpy API.
Installation
Add this line to your application's Gemfile:
gem 'steamspy'
And then execute:
$ bundle
Or install it yourself as:
$ gem install steamspy
Usage
require 'steamspy'
steamspy = SteamSpy::Api.new
# Get application details
ss = steamspy.appdetails(730)
ss.status # => 200
ss.data # => {...}
# Get games in genre
ss = steamspy.genre("Early Access")
# Get top 100 games by players in the last two weeks
ss = steamspy.top100in2weeks
# Get top 100 games by players since March 2009
ss = steamspy.top100forever
# Get top 100 games by owners
ss = steamspy.top100owned
# Get all games with owners data sorted by owners
ss = steamspy.allMore information about API could be found in the official website.
License
The SteamSpy rubygem is released under the MIT license.