Freemium is a business model by which a proprietary product or service (typically a digital offering such as software, media, games or web services) is provided free of charge, but money (premium) is charged for advanced features, functionality, or virtual goods. The word "freemium" is a portmanteau neologism combining the two aspects of the business model: "free" and "premium".But you can find way too many 'freemium' upgrades in an online game for a dollar amount that cost more then a full-pledged PC game .
Ubisoft publishes strategical F2P games ,mentioned in the first post