Linear: will put the rooms in a linear fashion so that every colored door you see means there is an item or just a dead end. Blue door means the way to go or a save (saves are at their normal location).
Branching: Will have different path with major item at the end that you need to venture in another branch, making it more vanilla like (but no map available)
150 and 50 rooms challenge: Same as linear but with higher or lower amount of rooms
-You can randomize items, Major and Minor items
-You can randomize item locations (Limited to within the same room)
increase and lower difficulty settings.(Progressive difficulty and hell run level)