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# GKAchievementChallenge

A type of challenge where a player must earn another player’s achievement.

```
class GKAchievementChallenge
```

## Topics

### Obtaining the Achievement

[`achievement`](/documentation/GameKit/GKAchievementChallenge/achievement)

The achievement that the player must earn to complete the challenge.

## Relationships

### Inherits From

[`GKChallenge`](/documentation/GameKit/GKChallenge)

### Conforms To

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`NSCoding`](/documentation/Foundation/NSCoding)

[`NSSecureCoding`](/documentation/Foundation/NSSecureCoding)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CVarArg`](/documentation/Swift/CVarArg)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

---

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