3.P Tiered Gestalt Rules+How does multiclassing work?

Multiclassing is allowed and encouraged, following most of the same rules as non-gestalt games.  However, after your first three primary classes, any additional classes begin their CP cost progression as though you were taking your third level in that class.

For example, if you chose to multiclass into sorcerer after already taking at least one level in three other classes, then you'd have to pay 4 CP for your first sorcerer level, 8 CP for your second, 12 for your third, etc.  This means that you'll only ever pay 1 or 2 CP for the first two levels in up to three classes (your primary classes), excluding tier 5 or 6 classes.

Multiclassing or gestalting hybrid classes with their base classes is allowed.  Your primary classes don't strictly need to be the first three classes you take, but you should specify them at character creation.

Multiclassing in tiered gestalt can get complicated very quickly, so it's best to keep track of your classes and CP costs in a spreadsheet or table.  Link any level-by-level breakdown when you submit your character sheet.

2023 Note: Changes to the tier cost scaling removes the need for the "three primary classes" rule above.  No need to track anything like that anymore.