Rail Riders is a 4 player and a Duel mini-game appearing in Mario Party DS.
The area appears to take place in a house with railings, a portrait of fruits and a red carpet on the stairs and the ground. Additionally, the house appears to be a brown-colored house, due to the layout.
The goal of this mini-game is for players to slide down a railing on their leaves. Since the game controls their movements, they cannot fall off the railings. The more momentum players get, the faster they get, meaning that they can fly off further than the other players in the process if one does it quicker. There is a meter saying how far players go in the process of sliding down the staircase railings. The main goal is for players to fly the furthest in order to win.