Here is the full list of all 20 The Jackbox Party Pack achievements.
Play a game with 10 or more players
Win three rounds in a row
Play a perfect round where all words get accepted
Play a full 8-player game
Guess every drawing correctly in a game
Enter one of the 7 bugs' secret names as your name
Win a game by more than 3000 points
Get all questions right in an episode
Ace a DisOrDat
Type the word "nugget" and get it accepted
Fool every other player with a Lie in a 3+ player game
Write a Lie that's actually the Truth
All players find the truth on a question
Enter the same thing as another player
Draw something that everyone guesses correctly
Fool every other player with your title of another player's drawing
Come from behind to win during the Jack Attack
Win all Wrong Answer of the Game prizes
Play a perfect round
Win three games in a row