Vanillaware

Previously it was known as Puraguru from 2002 until 2004, when it renamed as Vanillaware. The studio's past projects have specialized in 2D, or sprite-based, game design. They have garnered positive attention from fans and game media alike for embracing 2D game design in a market dominated by 3D games. The company was formed from members of the Atlus project team which had developed Princess Crown for the Sega Saturn in 1997.

Source : IGDB