Here is the full list of all 26 NHL 07 achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Have a player on your team win Most Valuable Player during a season in Dynasty Mode™
Have a player on your team win the Conn Smythe Trophy as Most Valuable Player during the playoffs
Come in first place overall during a season in Dynasty Mode™
Win the Stanley Cup®. A minimum of 10 games must be played during the playoffs
Your team must earn 100 points in a season in Dynasty Mode™
Win a tournament with a minimum of 3 games played in All Star mode
Win 10 games in a row in Dynasty Mode™
Score a goal on the powerplay with a defenseman in All Star Mode
Score 2 goals on the Powerplay with the same player in Pro Mode
Complete all 10 years of Dynasty Mode™
Complete a season in Dynasty Mode™
Get a shutout in Superstar Mode
Win a shootout 2-0 without taking the third shot in the shootout
Have a player get 3 goals in Superstar Mode
Score a goal in Superstar Mode
Win a game in Superstar mode vs. the CPU
Score a goal in All Star Mode
Win a game in All Star mode vs. the CPU
Win a game in shootout mode
Have a player get 3 goals in Rookie Mode in a game
Have one player get 3 assists in Rookie Mode in a game
Score 5 goals in a game with one player
Win a game in Rookie Mode vs. the CPU
Score a short handed goal in Pro Mode
Win a game in Pro Mode vs. the CPU
Play and Complete an Online ranked game