Here is the full list of all 29 Mecha Ace achievements.
Use Lightbearer to force an end to the war.
Intimidate the enemy fleet into surrendering.
Romance your bridge controller.
Recover a prototype from the enemy.
Romance your wingperson.
Your willpower failed you at a crucial moment.
Play through the story with an all-male cast.
Play through the story with an all-female cast.
Help Hawkins destroy Lightbearer.
Use Lightbearer to destroy the enemy fleet.
Complete the main story.
You destroyed an enemy machine by landing on it.
You saved Crown Station from destruction.
Defeat the Roland while Hawkins is piloting it.
Max out your melee combat ability.
Max out your ranged combat ability.
End the story with less than 20 Reputation.
End the story with more than 80 Reputation.
Run away during the battle of Crown Station.
You became head of the Damocles Initiative.
You fell in love with Hawkins.
Romance your deck chief.
You resorted to corporal punishment.
Bury Hawkins in a swarm of missiles.
You got everyone, yourself included, killed.
Every major character survived to the end of the story.
You flew a swift machine painted red and gold.
You ended the story with more than 80 kills.
You lost your ranged weapon in combat, twice!