Many of US remember the classic SEGA games that we grew up with as kids. In order to keep these games relevant (and in order to keep making it money), the Japanese company is launching SEGA Forever to bring back "nearly every SEGA game ever released from every console era - Master System, Genesis/Mega Drive, and Dreamcast - SEGA's last system before deciding to stop making hardware altogether. Games will be free to play and ad-supported, though SEGA will likely provide an option to pay a subscription for no-ads. These ads would briefly play before you start playing a game. You'll also...
Source: http://www.gsmarena.com/sega_forever_collection_brings_sega_classics_to_android_and_ios_for_free-news-25775.php