Here is the full list of all 21 Drunk or Dead achievements.
Reload for the first time
Kill 20 zombies
Kill 5 bosses
You've harrassed the bartender
Alternate a shot of alcohol and headshot three times in a row
Make three headshots in a row
Kill 20 "french" zombies in a row.
Drink yourself to death
Drink 1000+ litres of alcohol
Try all kinds of alcohol in the first bar scene
Kill 500 zombies
Kill 5000 zombies
Kill 35 bosses
Kill 200 bosses
You've played the piano
You've played the guitar
You kept your drunk-o-meter between 2 and 6 for 4 minutes
Kill five zombies in a row while drunk over 6
Simultaneously kill three zombies with a shotgun
The Dancer Girl in Kinky Butts survives.
The Dancer Girl in Kinky Butts dies.