Here is the full list of all 45 FIFA 18 trophies - there are 32 bronze, 9 silver, 3 gold and 1 platinum.
Unlock all other trophies (excluding additional content trophies)
Complete a Squad Building Challenge Group in FIFA Ultimate Team
Win all 4 matches in a FUT Draft session in FIFA Ultimate Team
Complete your first Squad Building Challenge in FIFA Ultimate Team
Win a game in FIFA Ultimate Team Squad Battles
Play 20 games in any game mode within FIFA Ultimate Team
Complete a Weekly Objective in FIFA Ultimate Team
Win promotion to Division 1 of FIFA Ultimate Team Seasons
Complete a Daily Objective in FIFA Ultimate Team
Challenge and complete a match against the Team of the Week in FIFA Ultimate Team
Win a division title in FIFA Ultimate Team Seasons
Complete an entire day's Daily Objectives in FIFA Ultimate Team
Complete 20 Squad Building Challenges in FIFA Ultimate Team
In Pro Clubs, use in matches each of your 3 Play Styles
Unlock all traits in one skill-tree path
Finish an Online Friendlies Season
Complete and win your first Pro Club Seasons league match
Win Division Title in Online Seasons (must be obtained through game-play)
Spend a skill point in Pro Clubs