Initial D: Extreme Stage (頭文字D エクストリーム ステージ) is a racing game developed by Sega for the PlayStation 3. It was released in Japan, Hong Kong, Singapore, Taiwan and South Korea on July 3, 2008. It is the sequel to PlayStation 2's Initial D: Special Stage and the PlayStation Portable's Initial D: Street Stage. This game was released in two versions, the Japanese version and the Asian version. They are both in Japanese, but the Asian version offers an English manual and only the Japanese version allows for online play.
It bears much similarity to Initial D: Arcade Stage 4 with some tweaks and additions. Restrictions placed on the player in the arcade, such as only allowing vehicle tuning after 3 IC card ejects, have been removed as there is no IC card component in this game.
Japanese players were given the option to download a free patch released later to unlock 3 cars that were added into IDAS4 version 1.5: RX-8, MX-5, and Altezza. Japanese players also have the option to buy two additional My Character Part add-ons, which if purchased gave you more character customization parts for ¥ 336 each.
Source: Wikipedia, "Initial D: Extreme Stage", available under the CC-BY-SA License.