Gameplay Guide...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Thousand Thunderbolts	[Survival] Achieve 1,000 kills in a single sortie.
Aegis Ascendant	[Survival] Complete Operation Frozen Aegis without taking any base damage.
Bringer of Thunder	[Survival] Hold the line and complete Operation Thunderfield
Desolation Dealer	[Survival] Achieve 500 kills in a single sortie.
Eye of the Storm	[Survival] Complete Operation Thunderfield without taking any base damage.
Frozen Aegis	[Survival] Hold the line and complete Operation Frozen Aegis
Iron Crucible	[Survival] Hold the line and complete Operation Iron Crucible
Keeper of Purity	[Survival] Complete Operation Faithkeeper without taking any base damage.
Maiden Flight	[Survival] Take to the skies on your first sortie.
Master of the Skies	[Survival] Complete all operations and protect each base from every threat.
Peak Predator	[Survival] Achieve 2500 kills in a single sortie.
Protector Supreme	[Survival] Complete all operations without taking any base damage.
Reality Check	[Survival] Every victory starts with a loss. This was yours
Rookie Reaper	[Survival] Achieve 100 kills in a single sortie.
Sacred Guardian	[Survival] Hold the line and complete Operation Faithkeeper
Sentinel's Vigilance	[Survival] Complete Operation Sentinel Peak without taking any base damage.
Tempered by Precision	[Survival] Complete Operation Iron Crucible without taking any base damage.
The Sleeper Has Awakened	[Survival] Hold the line and complete Operation Dune Bastion.
The Spice Flows	[Survival] Complete Operation Dune Bastion without taking any base damage.
Unyielding Watch	[Survival] Hold the line and complete Operation Sentinel Peak.