Psycho (Fallout 2)

Psycho is a consumable item in Fallout 2.

Characteristics
Psycho is a powerful combat drug that greatly increases survival chances, particularly for non-player characters who cannot wear armor (eg. Goris). The Intelligence reducing effect will also cause skills tied to this attribute to be lowered, though not nearly enough to significantly cripple their use.

Psycho can be (ab)used to lower the player character's Intelligence in order to access "stupid" dialogue (if the Intelligence falls below 4), which can give unique benefits. Notably, Psycho can also be abused to inflate skills. Since all points above 100% cost an increasing number of skill points (eg. 2 for 1 point above 100%), the player can take Psycho to lower their skills below that threshold, then inflate them with skill points. This can also be used with skill books, to lower the skill below the 91% threshold.