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