Alteil (アルテイル, Aruteiru) is a story-driven, Flash-based online collectible card game produced by Japanese studio Dex Entertainment and published by Media Blasters.

Besides the main game, Alteil also contains three minigames: Lavato Hero's (ラヴァートヒーローズ, Ravāto Hīrōzu), Napoleon (ナポレオン～ラヴァート大決戦～, Naporeon ~Ravāto Daikessen~), and Mirage Master (ミラージュマスター, Mirāju Masutā).

These spheres are individually called: Refess (リフェス, Rifesu), Lawtia (ローティア, Rōtia), Gowen (ゴウエン, Gouen), and Falkow (ファルカウ, Farukau).

Inventor Spot states: "Alteil takes up where these games leave off, adding exquisite anime style artwork and an online dimension few RPGs can match!"

[3] Nate Ming at Crunchyroll praised the "smartly-designed system and beautiful card art.