Here is the full list of all 20 The Jackbox Party Pack 4 achievements.
Each part of the final round portrait comes from a different player
Draw something that gets 100 poop emojis
Get both of your additions accepted in a single round (non final round)
Get all player votes and 90% of audience votes in a single matchup (5+ player game)
Win a bracket with an answer that everyone predicted would lose each round
Win a 4-way tied overtime match up
Have a match up go to overtime with an audience playing along
Beat Gene in a game
Get the Best Burn twice in one game
Select the image of the animal that lives the "life of a twig eater"
Win a game without getting a Best Burn
Nobody gets a date during one of the nights
Finish a game with the Audience as the winner
Finish a game with everyone turned into werewolves
A player successfully gets a date all six nights of the game
Fool 7 players in the final round of Enough About You
All players pick the truth in a 5+ player game of Enough About You (non final round)
Write a lie that's actually the truth in the final round of Fibbage 3
Audience fools a player
Win a bracket with an answer that gets 100% of the votes each round