LogFAQs > #946144144

You unlock stages by either beating them because somebody else added them to the rotation, or by beating the stage prior to it if it's the next one in line for you to unlock.

So, like, if you beat 3-2 because somebody else added 3-2, you'll unlock 3-2.
But if you're doing it on your own (nobody added 3-2), and you have everything up to 3-1 unlocked, then you'll unlock 3-2 by beating 3-1.

---

Seplito Nash, Smelling Like the Vault since 1996
Step FOUR! Get Paid!