IsPathCriticalObject

[Avenger]

0x40f5 IsPathCriticalObject(Object)

 

Checks if the target actor has its (multiclass/areaflags) set to 0x2000. (This is where bg2 stores multiclass, iwd2 stores values from creareaflg.ids etc.)

 

If a creature with such a flag dies, the game is over.

 

As a side note, IWD2 redefines most of the bits in this field.

[Avenger]

SetCriticalPathObject(object, boolean) does what you would expect, flips the bit in mc flags according to the boolean value.