An AchievementDefinition defines an achievement; this includes its name and how it is unlocked. For an individual user's progress in unlocking an achievement, see AchievementProgress. It can be retrieved using ovr_Achievements_GetAllDefinitions().

It is required for bitfield achievements(ovrAchievement_TypeBitfield). This represents the size of the bitfield for this achievement.

A string of the api name of the achievement. It can be used to get the achievement progress by name by the function ovr_Achievements_GetProgressByName().

This is the type of achievement. There are three types of achievement: ovrAchievement_TypeSimple - unlocked by completion of a single event or objective, ovrAchievement_TypeBitfield - unlocked when a number of bits in a bitfield are set, and ovrAchievement_TypeCount - unlocked when a counter reaches a defined target.