(A/N: Okay it's done. I'm really sorry! and this chapter is dedicated to Chibi_Wolf38 for the castle.)
The system only allowed a certain number of players in a team as challengers per mode: 1-10 for normal, 1-20 for hard, 1-30 for difficult, and 1-50 for nightmare, with a player level cap of 40 to ensure fairness. This is why players wanted to grind as much as possible before they hit the level cap.
The interior of each floor in the dungeon adapted to space folding technology can be as big as a village, a town, or a small city depending on the design, and the minimum level of monsters is N (Boss's level minus 5).
Normal and hard dungeon modes had four floors that players needed to conquer. Difficult has 5 floors, while Nightmare has 6 floors
One of which is focused on overcoming environmental conditions and hazards like malaria, cold, heat, and many more.