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