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