Here is the full list of all 75 Ancient Frontier: Steel Shadows achievements.
Complete the Tutorial
Beat the first Pirate Mission
Complete a contract with Viper
Retreat from a Mission
Retreat from 5 Missions
Beat a Simulator Mission
Beat 5 Simulator Missions
Beat 15 Simulator Missions
Beat a Bounty Mission
Beat 5 Bounty Missions
Beat 15 Bounty Missions
Beat 25 Bounty Missions
Beat 50 Bounty Missions
Beat 75 Bounty MIssions
Beat the rogue Federation Carrier
Stockpile 1000 Hydrium
Stockpile 2000 Hydrium
Stockpile 3000 Hydrium
Stockpile 1000 Energy
Stockpile 2000 Energy
Stockpile 3000 Energy
Stockpile 1000 Data
Stockpile 2000 Data
Stockpile 3000 Data
Purchase 1 Tech
Purchase 10 Techs
Purchase 25 Techs
Purchase 50 Techs
Purchase 100 Techs
Have a ship with 1 Kill
Have a ship with 10 Kills
Have a ship with 25 Kills
Have a ship with 50 Kills
Have a ship with 75 Kills
Have a ship with 100 Kills
Beat Sector One of the Pirate Campaign
Beat Sector One of the Pirate Campaign on Veteran or harder difficulty
Beat Sector One of the Pirate Campaign on Epic difficulty
Beat Sector Two of the Pirate Campaign
Beat Sector Two of the Pirate Campaign on Veteran or harder difficulty
Beat Sector Two of the Pirate Campaign on Epic difficulty
Beat Sector Three of the Pirate Campaign
Beat Sector Three of the Pirate Campaign on Veteran or harder difficulty
Beat Sector Three of the Pirate Campaign on Epic difficulty
Beat Sector Four of the Pirate Campaign
Beat Sector Four of the Pirate Campaign on Veteran or harder difficulty
Beat Sector Four of the Pirate Campaign on Epic difficulty
Beat Sector Five of the Pirate Campaign
Beat Sector Five of the Pirate Campaign on Veteran or harder difficulty
Beat Sector Five of the Pirate Campaign on Epic difficulty
Save Freya from the graveyard
Beat Sector Six of the Pirate Campaign
Beat Sector Six of the Pirate Campaign on Veteran or harder difficulty
Beat Sector Six of the Pirate Campaign on Epic difficulty
Meet the Insurrection
Side with the Pirate Queen
Rescue Kora from her lifepod
Win the Game
Capture an alien spore pod
Visit Razor Station
Defeat the Rembrandt
Discover the Heresy Station
Make your stand against the Widow and Karth
Gain the Sherwood
Unlock the Heartless
Unlock the Steel Scarab
Unlock the Midnight Star
Unlock the Scion
Beat Sector Seven of the Pirate Campaign
Beat Sector Seven of the Pirate Campaign on Veteran or harder difficulty
Beat Sector Seven of the Pirate Campaign on Epic difficulty
Defeat Reginald Greyson
Meet the Machine Heresy
Unlock the Hellraiser
The Black Widow rises