Here is the full list of all 97 Legends of Pegasus achievements.
Investigate 10 Xenon ruins!
You have complete 10000 turns!
Explore 10 star systems!
Build 10 Human Battleships!
Establish 15 colonies!
Create your own race!
You have completed 500 turns!
Fight in a battle with two or more other factions!
Establish a colony!
Establish 150 colonies!
Establish 1500 colonies
Build 100 Human Corvettes!
Build 500 Human Corvettes!
Build 2500 Human Corvettes!
Build 75 Human Frigates!
Build 400 Human Frigates!
Build 2000 Human Frigates!
Build 50 Human Destroyers!
Build 250 Human Destroyers!
Build 1250 Human Destroyers!
Build 25 Human Cruisers!
Build 125 Human Cruisers!
Build 600 Human Cruisers!
Build 50 Human Battleships!
Build 250 Human Battleships!
Build 100 X'or Corvettes!
Build 500 X'or Corvettes!
Build 2500 X'or Corvettes!
Build 75 X'or Frigates!
Build 400 X'or Frigates!
Build 2000 X'or Frigates!
Build 50 X'or Destroyers!
Build 250 X'or Destroyers!
Build 1250 X'or Destroyers!
Build 25 X'or Cruisers!
Build 125 X'or Cruisers!
Build 600 X'or Cruisers!
Build 10 X'or Battleships!
Build 50 X'or Battleships!
Build 250 X'or Battleships!
Build 100 Arthrox Scouts!
Build 500 Arthrox Scouts!
Build 2500 Arthrox Scouts!
Build 75 Arthrox Raiders!
Build 400 Arthrox Raiders!
Build 2000 Arthrox Raiders!
Build 25 Arthrox Avengers!
Build 125 Arthrox Avengers!
Build 600 Arthrox Avengers!
Build 10 Arthrox Berserkers!
Build 50 Arthrox Berserkers!
Build 250 Arthrox Berserkers!
Destroy a Battleship!
Destroy 15 Battleships!
Destroy 150 Battleships!
Destroy 1500 Battleships!
Invade a planet!
Invade 15 planets!
Invade 150 planets!
Invade 1500 planets!
Achieve an overall population of 10 billions!
Achieve an overall population of 100 billions!
Achieve an overall population of 500 billions!
Colonize 3 star systems!
Colonize 50 star systems!
Colonize 350 star systems!
Hold two thirds of all star systems in a tiny galaxy!
Hold two thirds of all star systems in a small galaxy!
Hold two thirds of all star systems in a medium sized galaxy!
Hold two thirds of all star systems in a large sized galaxy!
Hold two thirds of all star systems in a giant sized galaxy!
Repell 50 invasions!
Build 5 weapon platforms!
Build 25 weapon platforms!
Build 125 weapon platforms!
You have completed 50000 (!) turns!
Investigate 100 Xenon ruins!
Explore 100 star systems!
Explore 1000 star systems!
Play one game as Human!
Play 10 games as Human!
Play 100 games as Human!
Play one game as X'or!
Play 10 games as X'or!
Play 100 games as X'or!
Play one game as Arthrox!
Play 10 games as Arthrox!
Play 100 games as Arthrox!
Flee from a battle!
Flee from 10 battles!
Flee from 100 battles!
Colonize five planets in one turn!
Complete the Human campaign!
Complete the X'or campaign!
Complete the Arthrox campaign!
Fight in a battle with 4 or more other factions!
Fight in a battle with 7 other factions!