Achievement

Refers to an accomplishment that's formally recognized by a game, site, or app. Achievements are sometimes represented by a virtual badge, star, medal, or other reward.

Use title-style capitalization for the achievement name. Lowercase the word achievement when it follows the achievement name.

For Microsoft games, use achievement only if the achievement is awarded in a player’s Xbox Live profile. Don't use achievement for any other accomplishments that are tracked by a game.

Examples
You just earned the Superstar achievement!
Take a bow—you’ve earned your Superstar.

See also badge