Here is the full list of all 10 Fibbage XL achievements.
Win the Thumbs Cup
Play a full game with 8 players
Use the "lie for me!" button
Write a Lie that's actually the Truth
Trick someone with one of your Lies
Enter a Lie
All players find the truth on a question
Enter the same thing as another player
Play through all the questions in the game
Fool every other player with a Lie in a 3+ player game