達成は英語で
achievement

英語の定義

achievement
1. n. The act of achieving or performing; a successful performance; accomplishment
2. n. A great or heroic deed or feat; something accomplished by valor or boldness
3. n. (heraldry) An escutcheon or ensign armorial; now generally applied to the funeral shield commonly called hatchment.
4. n. (video games) An award for completing a particular task or meeting an objective in a video game.
Finishing the game does not give you a 100% score until you have unlocked all of the achievements.

accomplishment
1. n. The act of accomplishing; completion; fulfillment
the accomplishment of an enterprise, of a prophecy, etc -
2. n. That which completes, perfects, or equips thoroughly; acquirement; attainment; that which constitutes excellence of mind, or elegance of manners, acquired by education or training.
3. n. Something accomplished; an achievement.