A rank unlocks later in the story, they are jumbo stardrops, moondrops, etc. Every prize is seperated into ranks that show how valuable each one is with C being the lowest and S being the highest. During the post-game, when you go to the casino in Tombstone Trail you're awarded with a RIP pass. This gains you access to the RIP theater room and unlocks. S rank unlocks after you beat the game, they are tickets to. If the player goes right at the very first fork in the trail, it is in the immediate viewpoint. . I have lots of chips and was wondering if it would unlock before i beat the game. ni no kuni casino prizes. I don't know if i'm near the end but i'm at nevermore now. The casino is located at the beginning of the Tombstone Trail. advertisement.