Here is the full list of all 39 FIFA 15 trophies - there are 24 bronze, 10 silver, 4 gold and 1 platinum.
Unlock all other trophies (excluding additional content trophies)
Prevent a goal with a Sliding goal line clearance
Complete a Match Day Challenge in Highlights of the Week on at least World Class difficulty
Save 3 Penalty Kicks Shots (in game, not shootouts) with the GK.
Score from a direct Free Kick at a distance greater than 30 yards.
Enable a custom Free Kick or Penalty style for your Pro
Have your Pro featured in the team of the week in Player Career
Fill up all Team Sheets Slots
Create a New Team Sheet
Win a trophy as a Team Manager in Career
Play a consecutive match in Seasons
Play Seasons with a Guest
Start a Co-op Seasons match with a Friend
Finish a Friendlies Season
Win a Friendly Season in FUT
Play a Game of the Week in Highlights of the Week
Buy a player who is in a league above you
Score 1 goal with a Knuckle Shot
Earn a player's loyalty in FUT by playing 10 or more games with him
Open 20 packs in FUT
Copy a Squad from the end of an online match in Ultimate Team
Win a division title in FUT Seasons
Score 1 goal with a Toe Poke
Beat the Keeper 1 on 1 and score
Beat a 5 Star Legendary CPU AI team with a 3 Star or lower team
Challenge the Team of the Week in FUT
Change your captain in FUT
Apply your first Chemistry Style consumable in FUT
Share an EA SPORTS Football Club Activity
Earn Promotion in Seasons
Sign a Loan Player from the EAS FC Catalogue
Complete all Drills in Learn to Play > The Basics
Beat a Friend's Skill Game score
Gift an EA SPORTS Football Club Catalogue Item
Perform a Standing Tackle and keep possession of the ball 10 times
Scout and find a player with any combination of 3 Global Transfer Network attributes in Career
Tag an EA SPORTS Football Club Activity
Comment on an EA SPORTS Football Club Activity
Reach EAS FC level 15