FantastiGames is powered by FreeRideGames. They have a player that it's used to install their games. Please install that player and initiate the uninstallation. From what I understand, FantastiGames installs only a toolbar which is attached to the browsers on your computer.
You can uninstall the toolbar:
-Google Chrome and other Chromium-based browsers: type chrome://extensions in the address bar. Press the thrash can icon next to the intended toolbar.
-Firefox: press Shift+Ctrl+A (or open Tools → Add-ons). Press Disable next to the intended toolbar. If you can't find the toolbar in the Extensions tab, switch to the Plugins tab and look there.
-Opera 12.x and older: press Ctrl+Shift+E (or press the Opera button → Extensions → Manage extensions) to open the Extensions menu. Press Uninstall next to the intended toolbar.
-Internet Explorer: open Tools → Manage Add-ons. Select the intended toolbar and press Disable.
If you still can't figure out the uninstallation process you might visit the page from Fantasigames website devoted to the problem.
