Here is the full list of all 20 The Jackbox Party Pack 6 achievements.
Humans win with one second or less remaining on the clock
Survive the game (and then some) while wearing Father's Hat
Get all the votes in an old favorite
You beat a joke that previously received unanimous votes in a 5-8 player game
All players get a role without tiebreakers in a 6 player game
Your definition gets all the player votes and 90% of the audience
The aliens win the game after a failed vote where they were properly isolated
Aliens win without using hacks
Aliens win in under five minutes
Win every matchup
Compete against a joke that previously received zero points
You elect to perform every joke
Get a role you doubled down on
Get a consolation role
Everyone but you chooses you for a role
Win a game as the audience
Crack someone's password
Win all three rounds in a 3-5 player game
Write a sentence in Round 3 that uses the entire character limit
Use the phrase "mucus ranch" and win a round with it