Amy's American Page One is a mobile phone game that was available through the Sonic Cafe service offered by Sega. Based on the Japanese card game, "American Page One," it features Amy competing against Rouge, Cream and a Hero Chao.
Tails no Flying Get is a mobile phone game released as part of the Sonic Cafe service offered by Sega. It was released just a day after Sonic Battle, with the intention that players could practice one of the mini-games.
Sonic the Hedgehog is a re-release of the 16-bit version of Sonic the Hedgehog (1991), released as part of the Sonic Cafe service offered by Sega. The game was created as part of the Sonic the Hedgehog series' 10th anniversary celebration, and was downloadable for free between 18 June and 31 July 2001.