Lucky Star: Ryōō Gakuen Ōtōsai

Lucky Star: Ryōō Gakuen Ōtōsai (らき☆すた ～陵桜学園 桜藤祭～ ) is a visual novel game that was released in Japan on January 24, 2008 by Kadokawa Shoten for the PlayStation 2. A version for PSP was released on December 23, 2010.

About the game
The game is a Romance-ADV Visual novel based on the Lucky Star characters. It is also the first type of Lucky Star in which the characters Kō Yasaka and Yamato Nagamori appeared. The game features the voice cast of the anime reprising their respective roles.

Soundtrack
A Soundtrack was released which featured the OP music, Hamatte Sabotte Oh My God!, and the ED music, Nantettatte Densetsu. It also featured off-vocal versions.

Demo
Apparently, an early version of Ryōō Gakuen Ōtōsai was released in 2005 for the PS2, known as the "Lucky Star Ravish Romance Kiosk Demo." The demo was used as promotion for the game and has several visual details and animations that are different or not there in the final game.