Ginga Tetsudou 999 DS (銀河鉄道999DS) is a railway simulation game released by Nintendo for the Nintendo DS in Japan. The game is based on the popular Japanese manga series Ginga Tetsudou 999 and allows players to explore the universe of the series while playing as the main character, Daisuke. Players can choose from a variety of trains, including steam locomotives, bullet trains, and freight trains. Players can also customize their trains by purchasing new parts and painting them. Additionally, players can explore the various planets featured in the series, interact with characters, and take part in various mini-games. The game also features a multiplayer mode, allowing players to compete against each other to complete the various levels. The game is a great way for fans of the manga series to explore the universe of the series in a fun and interactive way.