Here is the full list of all 19 UFO - there are Unfortunately Fortunate Organisms achievements.
Collect a total of 100 blue shirted humans.
Collect a total of 100 gold shirted humans.
Unlock all of the planets.
Defeat the boss.
Defeat the boss before 15 days.
Defeated the boss without going to a planet.
Fully upgrade weapons.
Fully upgrade cargo.
Fully upgrade health.
Fully upgrade spaceship.
Destroy 25 turrets.
Escape a planet with one health left.
Return to the mothership with a full cargo of gold shirted humans.
Return to the mothership without taking any damage.
Repair your ship for the first time.
Repair 10 or more hit points of health.
Bring home 1000+ in value of resources.
Kill 100 red armoured aliens.
Squish 50 humanoids.