Try your best.
Find a purpose
Unlock all back issues
Catch a comet
Collect all parts
Get real warm
Find a way to actually save the humans
Make a difficult decision
Search for survivors in a pile of rubble
Extinguish a forest fire
Chase a storm away
Fly through all the rings
Find a helpful lift
Destroy 25 asteroids
Land on a moon
Prove you're the best of the best
Try all filters in photo mode
Win a fight wearing the cute bow
Complete the game destroying less than 100 buildings
Make some noise while warping
Shake off a magnetic sapper
Swat a missile back at its sender
Clear a system without getting zapped by an energy anomaly
Destroy every building on a planet
Uproot every tree on a planet
Knock out every hostile ship on a planet
Win a fight while using a photo mode filter
Win a fight after losing the first encounter
Make an extra large impact crater
Blast off with a snare turret attached
Clear a system without destroying a single building
Try to leave the solar system
Visit 5 planets in a single system
Chase off the new invaders