Here is the full list of all 38 FIFA 15 achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Score from a direct Free Kick at a distance greater than 30 yards.
Sign a Loan Player from the EAS FC Catalogue
Score 1 goal with a Knuckle Shot
Share an EA SPORTS Football Club Activity
Perform a Standing Tackle and keep possession of the ball 10 times
Complete all Drills in Learn to Play > The Basics
Score 1 goal with a Toe Poke
Beat the Keeper 1 on 1 and score
Prevent a goal with a Sliding goal line clearance
Beat a 5 Star Legendary CPU AI team with a 3 Star or lower team
Save 3 Penalty Kicks Shots (in game, not shootouts) with the GK.
Earn a player's loyalty in FUT by playing 10 or more games with him
Apply your first Chemistry Style consumable in FUT
Challenge the Team of the Week in FUT
Open 20 packs in FUT
Win a division title in FUT Seasons
Win a Friendly Season in FUT
Change your captain in FUT
Copy a Squad from the end of an online match in Ultimate Team
Start a Co-op Seasons match with a friend
Play Seasons with a Guest
Earn Promotion in Seasons
Enable a custom Free Kick or Penalty style for your Pro
Finish a Friendlies Season
Play a consecutive match in Seasons
Gift an EA SPORTS Football Club Catalogue Item
Beat a friend's Skill Game score
Reach EAS FC level 15
Tag an EA SPORTS Football Club Activity
Comment on an EA SPORTS Football Club Activity
Scout and find a player with any combination of 3 Global Transfer Network attributes in Career
Win a trophy as a Team Manager in Career
Have your Pro featured in the team of the week in Player Career
Fill up all Team Sheets Slots
Create a New Team Sheet
Buy a player who is in a league above you
Complete a Match Day Challenge in Highlights of the Week on at least World Class difficulty
Play a Game of the Week in Highlights of the Week