Compulsive Behavior is a mental, mundane disadvantage, described in Basic Set, pp. 128-129, which gives the examples Compulsive Carousing, Compulsive Gambling, Compulsive Generosity, Compulsive Lying, Compulsive Spending, and Compulsive Vowing. It is referenced in GURPS Fantasy™, p. 219, which gives the new variant Compulsive Debating.
- Compulsive Generosity compared to Selfless 
- On Compulsive Dancing 
- Compared to Alcoholism in a GURPS Dungeon Fantasy™ game