diff --git a/lib/application_manager.rb b/lib/application_manager.rb
index 80287b5..29a4422 100644
--- a/lib/application_manager.rb
+++ b/lib/application_manager.rb
@@ -1,5 +1,7 @@
 class W3DHub
   class ApplicationManager
+    include CyberarmEngine::Common
+
     def initialize
       @tasks = [] # :installer, :importer, :repairer, :uninstaller
     end
@@ -75,8 +77,33 @@ class W3DHub
       end
     end
 
+    def run(app_id, channel, *args)
+      if (app_data = installed?(app_id, channel))
+        Process.spawn(app_data[:install_path], *args)
+      end
+    end
+
+    def installed!(task)
+      # install_dir
+      # installed_version
+      # installPath # game executable
+      # wine_prefix # optional
+
+      install_directory = Cache.install_path(task.application, task.channel)
+      application_data = {
+        install_directory: install_directory,
+        installed_version: task.channel.current_version,
+        install_path: "#{install_directory}/game.exe",
+        wine_prefix: task.wine_prefix
+      }
+
+      window.settings[:games] ||= {}
+      window.settings[:games,][:"#{task.app_id}_#{task.release_channel}"] = application_data
+      window.settings.save_settings
+    end
+
     def installed?(app_id, channel)
-      false
+      window.settings[:games, :"#{app_id}_#{channel}"]
     end
 
     def installing?(app_id, channel)
diff --git a/lib/application_manager/task.rb b/lib/application_manager/task.rb
index 62144bd..f3bfd00 100644
--- a/lib/application_manager/task.rb
+++ b/lib/application_manager/task.rb
@@ -5,7 +5,7 @@ class W3DHub
 
       attr_reader :app_id, :release_channel, :application, :channel,
                   :total_bytes_to_download, :bytes_downloaded, :packages_to_download,
-                  :manifests
+                  :manifests, :packages, :files, :wine_prefix
 
       def initialize(app_id, release_channel)
         @app_id = app_id
@@ -14,13 +14,17 @@ class W3DHub
         @task_state = :not_started # :not_started, :running, :paused, :halted, :complete, :failed
 
         @application = window.applications.games.find { |g| g.id == app_id }
-        @channel = @application.channels.find { |c| c.name == release_channel }
+        @channel = @application.channels.find { |c| c.id == release_channel }
 
         @packages_to_download = []
         @total_bytes_to_download = -1
         @bytes_downloaded = -1
 
         @manifests = []
+        @files = {}
+        @packages = []
+
+        @wine_prefix = nil
 
         setup
       end
@@ -88,7 +92,19 @@ class W3DHub
 
       def fail!(reason = "")
         @task_state = :failed
-        @task_failure_reason = "Failed: #{reason}"
+        @task_failure_reason = reason.to_s
+      end
+
+      # Quick checks before network and computational work starts
+      def fail_fast
+        # tar present?
+        tar_present = system("tar --help")
+        fail!("FAIL FAST: `tar --help` command failed, tar is not installed. Will be unable to unpack packages.") unless tar_present
+
+        if W3DHub.unix?
+          wine_present = system("which #{window.settings[:wine_command]}")
+          fail!("FAIL FAST: `which wine` command failed, wine is not installed. Will be unable to create prefixes or launch games.") unless wine_prefix
+        end
       end
 
       def run_on_main_thread(block)
@@ -154,6 +170,8 @@ class W3DHub
           puts "#{manifest.game}-#{manifest.type}: #{manifest.version} (#{manifest.base_version})"
 
           manifest.files.each do |file|
+            @files["#{file.name}:#{manifest.version}"] = file
+
             next if file.removed? # No package data
 
             if file.patch?
@@ -193,14 +211,13 @@ class W3DHub
         package_details = Api.package_details(hashes)
 
         if package_details
+          @packages = [package_details].flatten
           @packages_to_download = []
 
           update_application_taskbar("Downloading #{@application.name}...", "Verifying local packages...", 0.0)
 
           package_details.each do |pkg|
-            unless verify_package(pkg)
-              @packages_to_download << pkg
-            end
+            @packages_to_download << pkg unless verify_package(pkg)
           end
 
           @total_bytes_to_download = @packages_to_download.sum { |pkg| pkg.size - pkg.custom_partially_valid_at_bytes }
@@ -238,18 +255,62 @@ class W3DHub
       end
 
       def unpack_packages(packages)
+        path = Cache.install_path(@application, @channel)
+        puts "Unpacking packages in '#{path}'..."
+        Cache.create_directories(path)
+
+        packages.each do |package|
+          puts "    #{package.name}:#{package.version}"
+          package_path = Cache.package_path(package.category, package.subcategory, "#{package.name}.zip", package.version)
+
+          puts "      Running tar command: #{"tar -xf #{package_path} -C #{path}"}"
+          status = system("tar -xf #{package_path} -C #{path}")
+          if status
+          else
+            puts "COMMAND FAILED!"
+          end
+        end
       end
 
       def create_wine_prefix
+        if W3DHub.unix?
+          # TODO: create a wine prefix if configured
+        end
       end
 
       def install_dependencies(packages)
       end
 
       def mark_application_installed
+        window.application_manager.installed!(self)
+
         puts "#{@app_id} has been installed."
       end
 
+      def verify_files(_)
+        # TODO: Check extracted game files or just re-extract everything?
+
+        # Zip.on_exists_proc = true # Overwrite existing files
+        # zip_file = Zip::InputStream.new(File.open(package_path))
+        # while (entry = zip_file.get_next_entry)
+
+        #   extract_path = "#{path}/#{entry.name}"
+        #   manifest_file = @files["#{entry.name}:#{package.version}"]
+
+        #   if manifest_file.removed?
+        #     puts "      !skipped: #{extract_path}"
+        #   else
+        #     target_file_exits = File.exist?(extract_path)
+        #     next if target_file_exits # && Digest::SHA256.new.hexdigest(File.read(extract_path)) == manifest_file.checksum
+
+        #     puts "      #{path}/#{extract_path}"
+        #     Cache.create_directories(extract_path) unless target_file_exits
+
+        #     entry.extract(extract_path)
+        #   end
+        # end
+      end
+
       #############
       # Functions #
       #############
@@ -287,7 +348,7 @@ class W3DHub
         digest = Digest::SHA256.new
         path = Cache.package_path(package.category, package.subcategory, package.name, package.version)
 
-        return false unless File.exists?(path)
+        return false unless File.exist?(path)
 
         file_size = File.size(path)
         puts "    File size: #{file_size}"
@@ -300,7 +361,7 @@ class W3DHub
             read_length = chunk_size
             read_length = file_size - chunk_start if chunk_start + chunk_size > file_size
 
-            break if file_size - chunk_start < 0
+            break if (file_size - chunk_start).negative?
 
             f.seek(chunk_start)
 
@@ -327,4 +388,4 @@ class W3DHub
       end
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/application_manager/tasks/installer.rb b/lib/application_manager/tasks/installer.rb
index 8af379e..ffbd05f 100644
--- a/lib/application_manager/tasks/installer.rb
+++ b/lib/application_manager/tasks/installer.rb
@@ -6,6 +6,9 @@ class W3DHub
       end
 
       def execute_task
+        fail_fast
+        return false if failed?
+
         update_application_taskbar("Downloading #{@application.name}...", "Fetching manifests...", 0.0)
         manifests = fetch_manifests
         return false if failed?
@@ -33,7 +36,6 @@ class W3DHub
         sleep 1
 
         update_application_taskbar("Installing #{@application.name}...", "Installing dependencies...", 0.0)
-
         install_dependencies(packages)
         return false if failed?
         sleep 1
diff --git a/lib/cache.rb b/lib/cache.rb
index 5877b23..7bb6966 100644
--- a/lib/cache.rb
+++ b/lib/cache.rb
@@ -27,8 +27,8 @@ class W3DHub
       end
     end
 
-    def self.create_directories(path)
-      target_directory = File.dirname(path)
+    def self.create_directories(path, is_directory = false)
+      target_directory = is_directory ? path : File.dirname(path)
 
       FileUtils.mkdir_p(target_directory) unless Dir.exist?(target_directory)
     end
@@ -39,6 +39,12 @@ class W3DHub
       "#{package_cache_dir}/#{category}/#{subcategory}/#{version}/#{name}.package"
     end
 
+    def self.install_path(application, channel)
+      app_install_dir = $window.settings[:app_install_dir]
+
+      "#{app_install_dir}/#{application.category}/#{application.id}/#{channel.id}"
+    end
+
     # Download a W3D Hub package
     def self.fetch_package(package, block)
       path = package_path(package.category, package.subcategory, package.name, package.version)
diff --git a/lib/common.rb b/lib/common.rb
index 7e3bb93..d3d8ee8 100644
--- a/lib/common.rb
+++ b/lib/common.rb
@@ -15,4 +15,24 @@ class W3DHub
   def self.format_size_number(i)
     format("%0.2f", i)
   end
+
+  def self.windows?
+    RbConfig::CONFIG["host_os"] =~ /(mingw|mswin|windows)/i
+  end
+
+  def self.mac?
+    RbConfig::CONFIG["host_os"] =~ /(darwin|mac os)/i
+  end
+
+  def self.linux?
+    RbConfig::CONFIG["host_os"] =~ /(linux|bsd|aix|solaris)/i
+  end
+
+  def self.unix?
+    linux? || mac?
+  end
+
+  def self.home_directory
+    File.expand_path("~")
+  end
 end
diff --git a/lib/pages/games.rb b/lib/pages/games.rb
index a08f2b7..35c1442 100644
--- a/lib/pages/games.rb
+++ b/lib/pages/games.rb
@@ -43,7 +43,7 @@ class W3DHub
               self if hit?(x, y)
             end
 
-            game_button.subscribe(:clicked_left_mouse_button) do |e|
+            game_button.subscribe(:clicked_left_mouse_button) do
               populate_game_page(game, game.channels.first)
               populate_games_list
             end
@@ -85,16 +85,16 @@ class W3DHub
               #   end
               # end
 
-              if window.application_manager.installed?(game.id, channel.name)
+              if window.application_manager.installed?(game.id, channel.id)
                 Hash.new.tap { |hash|
-                  hash["Game Settings"] = { icon: "gear", block: proc { window.application_manager.settings(game.id, channel.name) } }
+                  hash["Game Settings"] = { icon: "gear", block: proc { window.application_manager.settings(game.id, channel.id) } }
                   if game.id != "ren"
-                    hash["Repair Installation"] = { icon: "wrench", block: proc { window.application_manager.repair(game.id, channel.name) } }
-                    hash["Uninstall"] = { icon: "trashCan", block: proc { window.application_manager.uninstall(game.id, channel.name) } }
+                    hash["Repair Installation"] = { icon: "wrench", block: proc { window.application_manager.repair(game.id, channel.id) } }
+                    hash["Uninstall"] = { icon: "trashCan", block: proc { window.application_manager.uninstall(game.id, channel.id) } }
                   end
-                  hash["Install Folder"] = { icon: nil, block: proc { window.application_manager.show_folder(game.id, channel.name, :installation) } }
-                  hash["User Data Folder"] = { icon: nil, block: proc { window.application_manager.show_folder(game.id, channel.name, :user_data) } }
-                  hash["View Screenshots"] = { icon: nil, block: proc { window.application_manager.show_folder(game.id, channel.name, :screenshots) } }
+                  hash["Install Folder"] = { icon: nil, block: proc { window.application_manager.show_folder(game.id, channel.id, :installation) } }
+                  hash["User Data Folder"] = { icon: nil, block: proc { window.application_manager.show_folder(game.id, channel.id, :user_data) } }
+                  hash["View Screenshots"] = { icon: nil, block: proc { window.application_manager.show_folder(game.id, channel.id, :screenshots) } }
                 }.each do |key, hash|
                   flow(width: 1.0, height: 22, margin_bottom: 8) do
                     image "#{GAME_ROOT_PATH}/media/ui_icons/#{hash[:icon]}.png", width: 0.11 if hash[:icon]
@@ -126,25 +126,24 @@ class W3DHub
           flow(width: 1.0, height: 0.08) do
             # background 0xff_551100
 
-            # TODO: Determine if game is installed or not and show apporpiante options ["Play Now" and "Single Player", "Install" and "Import"]
-            # game.play_items.each do |item|
-            #   button "<b>#{item.label}</b>", margin_left: 24 do
-            #     item.block&.call(game)
-            #   end
-            # end
             if window.application_manager.installed?(game.id, channel.id)
-              button "<b>Play Now</b>", margin_left: 24
-              button "<b>Single Player</b>", margin_left: 24
+              button "<b>Play Now</b>", margin_left: 24 do
+                window.application_manager.run(game.id, channel.id)
+              end
+
+              button "<b>Single Player</b>", margin_left: 24 do
+                window.application_manager.run(game.id, channel.id)
+              end
             else
               unless game.id == "ren"
-                button "<b>Install</b>", margin_left: 24, enabled: !window.application_manager.task?(:installer, game.id, channel.name) do |button|
+                button "<b>Install</b>", margin_left: 24, enabled: !window.application_manager.task?(:installer, game.id, channel.id) do |button|
                   button.enabled = false
-                  window.application_manager.install(game.id, channel.name)
+                  window.application_manager.install(game.id, channel.id)
                 end
               end
 
               button "<b>Import</b>", margin_left: 24, enabled: false do
-                window.application_manager.import(game.id, channel.name, "?")
+                window.application_manager.import(game.id, channel.id, "?")
               end
             end
           end
diff --git a/lib/settings.rb b/lib/settings.rb
index f616111..783ce2a 100644
--- a/lib/settings.rb
+++ b/lib/settings.rb
@@ -5,6 +5,8 @@ class W3DHub
         language: Gosu.user_languages.first.split("_").first,
         app_install_dir: default_app_install_dir,
         package_cache_dir: default_package_cache_dir,
+        wine_command: "wine",
+        create_wine_prefixes: true,
         allow_diagnostic_reports: false,
         server_list_username: nil,
         account: {},
@@ -14,45 +16,29 @@ class W3DHub
     end
 
     def self.default_app_install_dir
-      if windows?
-        "#{home_directory}/#{W3DHub::DIR_NAME}"
-      elsif linux?
-        "#{home_directory}/.local/share/#{W3DHub::DIR_NAME}"
-      elsif mac?
-        "#{home_directory}/.local/share/#{W3DHub::DIR_NAME}"
+      if W3DHub.windows?
+        "#{W3DHub.home_directory}/#{W3DHub::DIR_NAME}"
+      elsif W3DHub.linux?
+        "#{W3DHub.home_directory}/.local/share/#{W3DHub::DIR_NAME}"
+      elsif W3DHub.mac?
+        "#{W3DHub.home_directory}/.local/share/#{W3DHub::DIR_NAME}"
       else
         raise "Unknown platform: #{RbConfig::CONFIG["host_os"]}"
       end
     end
 
     def self.default_package_cache_dir
-      if windows?
-        "#{home_directory}/#{W3DHub::DIR_NAME}/Launcher/package-cache"
-      elsif linux?
-        "#{home_directory}/.local/share/#{W3DHub::DIR_NAME}/package-cache"
-      elsif mac?
-        "#{home_directory}/.local/share/#{W3DHub::DIR_NAME}/package-cache"
+      if W3DHub.windows?
+        "#{W3DHub.home_directory}/#{W3DHub::DIR_NAME}/Launcher/package-cache"
+      elsif W3DHub.linux?
+        "#{W3DHub.home_directory}/.local/share/#{W3DHub::DIR_NAME}/package-cache"
+      elsif W3DHub.mac?
+        "#{W3DHub.home_directory}/.local/share/#{W3DHub::DIR_NAME}/package-cache"
       else
         raise "Unknown platform: #{RbConfig::CONFIG["host_os"]}"
       end
     end
 
-    def self.windows?
-      RbConfig::CONFIG["host_os"] =~ /(mingw|mswin|windows)/i
-    end
-
-    def self.mac?
-      RbConfig::CONFIG["host_os"] =~ /(darwin|mac os)/i
-    end
-
-    def self.linux?
-      RbConfig::CONFIG["host_os"] =~ /(linux|bsd|aix|solaris)/i
-    end
-
-    def self.home_directory
-      File.expand_path("~")
-    end
-
     def initialize
       unless File.exist?(SETTINGS_FILE_PATH)
         @settings = Settings.defaults
diff --git a/lib/states/message_dialog.rb b/lib/states/message_dialog.rb
index 67078e8..d4ae1df 100644
--- a/lib/states/message_dialog.rb
+++ b/lib/states/message_dialog.rb
@@ -8,17 +8,23 @@ class W3DHub
 
         background 0xee_444444
 
-        stack(width: 1.0, height: 1.0, margin: 128, padding: 8, background: 0xee_222222) do
-          flow(width: 1.0, height: 0.06) do
+        stack(width: 1.0, height: 1.0, margin: 128, background: 0xee_222222) do
+          flow(width: 1.0, height: 0.1, padding: 8) do
+            background 0x88_000000
+
             image "#{GAME_ROOT_PATH}/media/ui_icons/warning.png", width: 0.04, align: :center, color: 0xff_ff8800
 
             tagline "<b>#{@options[:title]}</b>", width: 0.9, text_align: :center
           end
 
-          para @options[:message], width: 1.0, height: 0.7, padding: 8
+          stack(width: 1.0, height: 0.78, padding: 16) do
+            para @options[:message], width: 1.0
+          end
 
-          button "Okay", width: 1.0, margin_top: 64 do
-            pop_state
+          stack(width: 1.0, height: 0.1, padding: 8) do
+            button "Okay", width: 1.0 do
+              pop_state
+            end
           end
         end
       end
diff --git a/w3dhub.rb b/w3dhub.rb
index 5b9ed79..3b95630 100644
--- a/w3dhub.rb
+++ b/w3dhub.rb
@@ -9,9 +9,9 @@ end
 require "fileutils"
 require "digest"
 require "rexml"
-require "zlib"
 
 require "launchy"
+require "zip"
 
 class W3DHub
   GAME_ROOT_PATH = File.expand_path(".", __dir__)