Goodman Games

This may seem like a silly question, but here it is : can a magician who obtains spells during the course of an adventure learn them all (by succeeding at his INT roll) or is he limited to a certain number of memorizable spells only (depending on his level, etc.) ?

It's option B: Wizards are limited to a certain number of memorizable spells only, depending on level.

It's a very different system of magic than you find in D&D. Instead of getting more "spell slots" to be used per day at a new XP level, in DCC, you know that many more spells, total.