Punch Drunk

Punch Drunk is an achievement in Baldur's Gate 3. It requires the player to defeat twenty opponents with a party member who is drunk, in a single playthrough.

Strategy

To accumulate kills that count towards this achievement, it is only important for the party member to be drunk during the moment of the killing blow. They can drink any of the alcoholic drinks found in the game before entering combat, or during combat, before they land the killing blow.

An easy way to obtain all needed kills at once is by fighting the  Shadow-Cursed Ravens that spawn in Act Two, in the Shadow-Cursed Lands. Upon interacting with a dead cursed raven on the ground at X: 29 Y: 118, a large number of cursed ravens begin to spawn, each with only one hit point. They are killed easily en masse by using a lasting area of effect spell such as  Spirit Guardians, or by letting them flock towards one target and then using an ability such as  Shatter for area damage.

A similar opportunity is found in Act Three during the Roveer's Storehouse side quest, where the player is tasked with killing a large number of rats.