Do the alternate floors permenantly replace the originals

the-binding-of-isaac-rebirth

Easy question, do the alternate floors (AKA enviornments) permenantly replace the orignal floors? Like, when I beat all the bosses in the Basement and the Cellar starts spawning, will I ever get to play the Basement again or will it always be Cellar now? (the same for Caves / Catacombs, Depths / Necropolis, Womb / Utero, etc.)

Best Answer

No. You have a random chance of getting the alternate floor once you've unlocked it.

I think the chances of getting the regular floor are higher than the chance of getting an alternative floor.

Incidentally, floor 1 and floor 2 could be one alternate and one regular unless you get an XL floor.