Here is the full list of all 25 Buzz!: Quiz TV trophies - there are 6 bronze, 11 silver, 7 gold and 1 platinum.
All Trophies unlocked
Play 50 multiplayer games
Play 20 multiplayer games
Play five multiplayer games
Play 40 Sofa vs. Sofa games
Play 15 Sofa vs. Sofa games
Play one Sofa vs. Sofa game
Play 50 MyBuzz!™ games
Play 20 MyBuzz!™ games
Play one MyBuzz!™ game
Play 50 singleplayer games
Play 20 singleplayer games
Play five singleplayer games
Score over 5000 points in a singleplayer game
Score over 3000 points in a singleplayer game
Score over 1500 points in a singleplayer game
Win over 50 games of Sofa vs. Sofa
Win over 20 games of Sofa vs. Sofa
Win over five games of Sofa vs. Sofa
Correctly answer three questions in a row in under 0.5 seconds
Correctly answer ten questions in a row
Play through a game on every channel
Play using every contestant
Correctly answer all questions in a multiplayer round with all players
Create 20 MyBuzz! quizzes