After reaching level 99, you have the option of rebirthing back to level 1 instead of jumping directly to your third class.

Ragnarok even takes it a step further into a more literal interpretation of starting over.

Ragnarok Online gives you the option of advancing into second and third stage classes, depending on what your first stage class was.

Many, many Korean RPGs, particularly of the free-to-play kind, have the characters start out as classless, go through a lengthy and boring tutorial phase with few skills, before allowing them to progress to a generalized specialty (like Warrior, Wizard, etc.) before letting them progress further into specialized classes (such as Fire Wizard, or Spear Warrior).

The Fochlucan Lyrist class itself is an updated version of the original way you became a Bard in the first edition of Dungeons & Dragons, which involved a maddening process so convoluted and subject to chance that it handily explains why most Bards these days are Chaotic. The degree of specialisation required would vary from class to class one Prestige Class - the Fochlucan Lyrist - requires taking levels in three separate base classes. The trope namer is 3rd Edition Dungeons & Dragons, note where they were initially introduced as a tool for the DM for customizing NPCs where Prestige Classes would become available after fulfilling certain class-specific prerequisites.

What distinguishes a Prestige Class from a regular one is that you must have experience in another class before you can gain access to the Prestige Class, thus creating a natural progression of power.

A form of Power-Up in Role Playing Games with a Class and Level System, whereupon a character can choose to advance from a basic starting class to a more powerful, but more specialized class.

Star wars kotor 2 prestige classes