> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# XblAchievementRarityCategory

> XblAchievementRarityCategory

Enumeration values that indicate the rarity category for an achievement.

## Syntax

```cpp theme={null}
enum class XblAchievementRarityCategory  : uint32_t  
{  
    Unset = 0,  
    Rare = 1,  
    Common = 2  
}  
```

## Constants

| Constant | Description |
| - | - |
| Unset | The rarity is incalculable (e.g. no one has played the title yet, demoninator is 0). |
| Rare | The number of global users that have unlocked this achievement is between 0 - 10.9. |
| Common | The number of global users that have unlocked this achievement is between 11.0 - 100.0. |

## Requirements

**Header:** achievements\_c.h

## See also

[achievements\_c](https://docs.xbox.com/reference/live/xsapi-c/achievements_c/achievements_c_members.md)


## Related topics

- [achievements_c (contents)](https://docs.xbox.com/reference/live/xsapi-c/achievements_c/achievements_c_members.md)
- [XblAchievementUnlockEvent](https://docs.xbox.com/reference/live/xsapi-c/achievements_c/structs/xblachievementunlockevent.md)
- [Updating title-managed Achievements](https://docs.xbox.com/services/xbox-services/player-data/achievements/title-managed/how-to/live-how-to-update-achievements.md)
- [Achievements](https://docs.xbox.com/services/xbox-services/player-data/achievements/index.md)
- [XblAchievement](https://docs.xbox.com/reference/live/xsapi-c/achievements_c/structs/xblachievement.md)