Full list of all 21 Horny Holiday achievements.
The base game contains 9 achievements, and there is 1 DLC pack containing 12 achievements.
The Holiday Begins
Discovering Joy
Pleasant Conversation
A Short Walk
To Play or Not To Play
Level I Victory
Level II Victory
Level III Victory
The Best Ending
Jack Takes a Drink
Ashes to Ashes
The Party Begins
Into the Party
Bigger Than Expected
When Nature Calls
Playing Detective
Smells Like Success
Jack has a Snack
Give Her a Treat