Here is the full list of all 82 Heroes in the Sky-Origin achievements.
Achievement_of_HIS2_first_login
Achievement_of_Menace_of_War_over_Europe
Achievement_of_German_Invasion
Achievement_of_Massive_Training
Achievement_of_Bombing_of_Warsaw
Achievement_of_Winter War
Achievement_of_Norwegian_Invasion
Achievement_of_Weygand_attack
Achievement_of_Air_Battle_over_Belgium
Achievement_of_Air_Battle_of_the_Strait_of_Dover
Achievement_of_Air_Battle_of_Britain
Achievement_of_Revenge_Campaign
Achievement_of_Bombs_on_London
Achievement_of_Incursion_in_Scapa_Flow
Achievement_of_Submarine_reconnaissance
Achievement_of_Battle_of_London
Achievement_of_Strategic_battle
Achievement_of_First_attempt_to_Upgrade
Achievement_of_5times_attempt_to_Upgrade
Achievement_of_10times_attempt_to_Upgrade
Achievement_of_20times_attempt_to_Upgrade
Achievement_of_50times_attempt_to_Upgrade
Achievement_of_70times_attempt_to_Upgrade
Achievement_of_100times_attempt_to_Upgrade
Achievement_of_150times_attempt_to_Upgrade
Achievement_of_200times_attempt_to_Upgrade
Achievement_of_240times_attempt_to_Upgrade
Achievement_of_Buying_plane_for_the_first_time
Achievement_of_Buying_plane_for_3times_in_total
Achievement_of_Buying_plane_for_5times_in_total
Achievement_of_Buying_plane_for_7times_in_total
Achievement_of_Buying_plane_for_10times_in_total
Achievement_of_Buying_plane_for_11times_in_total
Achievement_of_Buying_bomber_for_the_first_time
Achievement_of_Play_Boss_Event_for_the_first_time
Achievement_of_Play_Boss_Event_for_3times
Achievement_of_Play_Boss_Event_for_5times
Achievement_of_Play_Boss_Event_for_7times
Achievement_of_Play_Boss_Event_for_10times
Achievement_of_Play_Boss_Event_for_15times
Achievement_of_Play_Boss_Event_for_20times
Achievement_of_Play_Boss_Event_for_30times
Achievement_of_Play_Boss_Event_for_50times
Achievement_of_Play_Boss_Event_for_70times
Achievement_of_Play_Boss_Event_for_100times
Achievement_of_Play_Boss_Event_for_150times
Achievement_of_Play_Boss_Event_for_200times
Achievement_of_Play_stacked_missions_for_the_first_time
Achievement_of_Play_stacked_missions_5times
Achievement_of_Play_stacked_missions_7times
Achievement_of_Play_stacked_missions_10times
Achievement_of_Play_stacked_missions_30times
Achievement_of_Play_stacked_missions_50times
Achievement_of_Play_stacked_missions_70times
Achievement_of_Play_stacked_missions_100times
Achievement_of_Play_stacked_missions_150times
Achievement_of_Play_stacked_missions_200times
Achievement_of_Play_stacked_missions_300times
Achievement_of_10,500Ghem_stacked
Achievement_of_11,000Ghem_stacked
Achievement_of_13,000Ghem_stacked
Achievement_of_15,000Ghem_stacked
Achievement_of_20,000Ghem_stacked
Achievement_of_25,000Ghem_stacked
Achievement_of_30,000Ghem_stacked
Achievement_of_50,000Ghem_stacked
Achievement_of_70,000Ghem_stacked
Achievement_of_100,000Ghem_stacked
Achievement_of_stacked_missions_for_the_first_time
Achievement_of_stacked_missions_3times
Achievement_of_stacked_missions_5times
Achievement_of_stacked_missions_7times
Achievement_of_stacked_missions_10times
Achievement_of_stacked_missions_15times
Achievement_of_stacked_missions_20times
Achievement_of_stacked_missions_30times
Achievement_of_stacked_missions_50times
Achievement_of_stacked_missions_100times
Achievement_of_stacked_missions_150times
Achievement_of_stacked_missions_200times
Achievement_of_stacked_missions_250times
Achievement_of_stacked_missions_300times