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