Game device equipped with modified cylinder for autonomously managing a favourable event

A game device of a roulette type which comprises a first moving part, equipped with a plurality of numbered boxes, adapted to receive a ball, the first moving part rotating inside a second fixed part, so that, by placing the ball on a track of the second fixed part and by launching it towards the first moving part, the ball ends its travel in one of the numbered boxes, thereby determining a winning number, wherein the numbered boxes comprise shaped boxes to provide at least one other stop position of the ball inside the numbered boxes;

• wherein the shaped boxes:
• have one or more holes, so that the ball can stop in different positions inside the numbered box, the different positions being outside one of the holes, or inside one of the holes;
• or have a recess, and are surrounded by a crown of a width up to 10 mm and a relief included between 0.1 mm and 2 mm, so that the ball can stop in two different positions inside the numbered box, the two different positions being outside the recess, or inside the recess;
• or have a concave section of an amplitude included between 5 mm and 15 mm, and a curvature having a depth included between 0.1 mm and 3 mm, the residual surface with respect to the concave section having different thicknesses with variations included between 0.1 mm and 4 mm and resulting in a profile, so that the ball can stop in two different positions inside the numbered box, the two different positions being outside the concave section, or inside the concave section.