IAchievementMgr* achievementMgr = player->GetAchievementMgr(); Achievement* achievement = achievementMgr->GetAchievement(ACHIEVEMENT_ID); if (achievement && achievement->IsAchieved()) { // The player has earned the achievement }In this example, the package library is likely the game engine or SDK being used, as the Player and IAchievementMgr classes are most likely part of that package.