Alteil (アルテイル Aruteiru?) is a story-driven, Flash-based online collectible card game produced by Dex Entertainment and published by Media Blasters. It was released in Japan in 2004, and released in English in 2008. Alteil claims to be the most popular online card game in its home country). The images on the online cards were designed by a team of Japanese fantasy artists, and the playing style is different from many other traditional card games. The game is no longer managed by Dex Entertainment, but is currently managed by GP Core Edge (a subsidiary of Gamepot).
Source: Wikipedia, "Alteil", available under the CC-BY-SA License.