On the main screen of Slime World, click on "Event" at the bottom to access the event screen.

On the Event screen, click the "GO ROULETTE" button to enter the roulette.

Upon entering the roulette, click the "Probability" button to view the probability information for items that appear in the roulette.

There are two types of roulettes available: the Orichalcum Roulette and the Slimestone Roulette. Each roulette offers different item rewards, with the Slimestone Roulette providing even more rewards. Additionally, roulette tickets obtained through events can be used to play the Orichalcum Roulette.