Here is the full list of all 51 Salvation Prophecy achievements.
Destroy the alien mother ship.
Walk the path of the sun to the alien homeworld.
Seek out the Rune of the Sun
Utterly destroy the Drone Unity faction.
Utterly destroy the Free Nations faction.
Walk the path of the void to the alien homeworld.
Seek out the Rune of the Void.
Utterly destroy the Wyr faction.
Consume 100 stims across all your battles.
As faction commander, make peace with another faction.
Colonize 5 planets as faction commander.
Defend a colony against an alien attack.
Construct 5 new space stations as faction commander.
Construct 5 new battleships as faction commander.
Destroy enough fighter ships to achieve a legendary reputation.
Utterly destroy the Salvation faction.
Seek out the Rune of Celestial Oblivion.
Travel to 10 different planets.
Deliver the killing blow to a mech.
Complete missions to obtain military rank 8, faction commander.
Complete a bounty mission against the pirate named Kelmar the Twitch.
Destroy enough fighter ships to achieve a colossal reputation.
Complete a bounty mission against the pirate named Fisheye Grim.
Complete a bounty mission against the pirate named Cranium Eterneon.
Destroy enough fighter ships to achieve an infamous reputation.
Seek out the Rune of Summoning.
Complete a bounty mission against the pirate named Shred Necrotitis.
Complete missions to obtain military rank 7.
Destroy enough fighter ships to achieve a lethal reputation.
Complete a bounty mission against the pirate named Deadman Fallen.
Complete a bounty mission against the pirate named The Reaver.
Deliver the final damage which destroys a battleship.
Complete missions to obtain military rank 6.
Deliver the final damage which destroys a space station.
Seek out the Rune of the Continuum.
Successfully navigate through an unstable wormhole.
Destroy enough fighter ships to achieve a feared reputation.
Complete missions to obtain military rank 5.
Complete a bounty mission against the pirate named Malice Blackhand.
Destroy enough fighter ships to achieve a dangerous reputation.
Complete a bounty mission against the pirate named Narcisus Humungous.
Complete missions to obtain military rank 4.
Destroy enough fighter ships to achieve a sturdy reputation.
Complete a bounty mission against the pirate named Shibby Wag.
Destroy enough fighter ships to achieve a capable reputation.
Complete a bounty mission against the pirate named Little Jack.
Complete missions to obtain military rank 3.
Destroy enough fighter ships to achieve a recognized reputation.
Successfully navigate through a wormhole.
Successfully navigate through jump space.
Complete missions to obtain military rank 2.