Here is the full list of all 48 NHL 20 achievements worth 1,000 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Xbox One.
Win the Stanley Cup® in Be A Pro mode.
Collect 100 Free Packs in Hockey Ultimate Team.
Score a goal with a between the legs shot in any mode.
Play and Complete a Ones Now Game.
Unlock a character in Ones Now.
Play and score your 1st NHL goal in a regular season game in Be a Pro.
Make your NHL team out of the preseason in Be a Pro.
Assign a scout to one of the WHL, OHL or QMJHL in Franchise Mode.
Get drafted to an NHL team in Be A pro Mode.
Complete 10 Sets in Hockey Ultimate Team.
Complete an Online game in Hockey Ultimate Team.
Score a goal as a Mascot in a NHL® Threes game .
Get an assist from a manual saucer pass in any mode.
Level up your World of Chel pro past Player Level 50.
Win a Squad Battles match in Hockey Ultimate Team.
Complete a Full Set of Daily Objectives in Hockey Ultimate Team.
Complete a game with a Team Overall of 85 or higher in Hockey Ultimate Team.
Buy or Sell an item in the auction house in Hockey Ultimate Team.
Choose and equip a customized player introduction animation.
Get an assist with a between the legs pass in any mode.
Knock off the opposing goalie's bottle from the net by scoring a goal.
Win a Ones game.
Deflect a shot with the Defensive Skill Stick in any mode.
Be a member of an EASHL club that has recently won a Division Title and return to the Seasons HUB.
Score a goal with a manual one timer in any mode.
Open your first Progression Rewards bag
Complete a game with 2 traits and a specialty applied to your player.
In an World of Chel game, score the game-winning overtime goal.
Score your first goal as a skater or complete and win your first game as a goalie in World of Chel.
Collect an Event Player in Hockey Ultimate Team.
Complete all training camp drills.
Win the Stanley Cup as the 32nd NHL team in Franchise Mode
Hire a head coach of A+ overall rating in Franchise Mode.
Have a coach win the Jack Adams trophy in Franchise Mode.
Complete and win an Online Co-op NHL® Threes Circuit Game.
Collect all the stars in a NHL® Threes Circuit.
Win the final circuit trophy for NHL® Threes Mode.
Win a Threes Eliminator Game.
Win a Ones Eliminator Tournament.
Win a Threes Eliminator Tournament.
Score a goal by flipping the puck back against the grain from the backhand toe drag in any mode.
Have a shutout and win a game as a user-controlled goalie in any mode.
Score a goal with a one hand tuck in any mode.
Apply a Hockey Ultimate Team Customization Item to a Player Item.
Earn a Competitive Season Reward in Hockey Ultimate Team.
Collect a non-loan Master Icon in Hockey Ultimate Team.
Earn a total 50 Stars in HUT Challenges.
Activate a Team Synergy in Hockey Ultimate Team.