Studio previously produced adaptation of prequel "Fate/zero" and anime scenes from PS Vita port
After previously adapting prequel Fate/zero, and the anime openings for the PS Port of Fate/stay night: Réalta Nua, anime studio ufotable confirmed that they're working on new anime based on modern fantasy visual novel Fate/stay night.
Following contradicting fan reports tied to the tangentially related 3D Garden of Sinners: Fukan Fukei, the studio took to Twitter to acknowledge the project.
Studio Deen previously produced a 2006 TV series based on the game.
From ufotable's work on Nealta Nua
Speaking of the studio and franchise, ufotable posted a promo for the Fate/zero Cafe gag adaptation accompanying the Garden of Sinners movie.