Here is the full list of all 32 Harry Potter: Quidditch Champions trophies - there are 14 bronze, 12 silver, 5 gold and 1 platinum.
Earn all Trophies
Win a game of Quidditch without conceding any points
Win 25 games of Quidditch
Earn a Platinum medal for each role
Customize a character in your roster
Win any Cup on Champion difficulty
Reach level 50 in your Career
Win 5 Games of Quidditch While in a Party
Complete a Career Challenge
Complete a Mastery Challenge for each role
Max out skill points in a single role
Upgrade a broom to max level
Assist a goal by shovel-passing to a teammate shortly before they score
Complete Beater Training
Eliminate the opposing Beater without getting hit by a Bludger
Get an assist by stunning the enemy Keeper shortly before a goal
Complete Keeper Training
Save a goal with your Power Save
Save a shot on goal from a Chaser you recently debuffed
Complete Seeker Training
Catch a Snitch in less than 120 seconds
Catch a Snitch without getting hit by a Bludger
Complete The Burrow Cup
Win your first game
Win 100 Games of Quidditch
Stun a Player while they are highlighted for a score event
Win the Hogwarts Interhouse Cup for the first time
Win the Triwizard Quidditch Cup for the first time
Win the World Cup for the first time
Play 5 PVP Matches
Complete Chaser Training
Intercept a shot on your goals