Here is the full list of all 64 Ziggy's Cosmic Adventures Playtest achievements.
Ejected a dead Ziggy into the vacuum of Space.
Respond "No" to all Dialogs.
Collect all Bronze trophies.
Collect all Silver trophies.
Collect all Gold trophies.
Convert all your trophies to Cosmic.
Complete all story paths.
Beat the Empress.
Escape the Empress.
Dropped Ziggy 100 times.
Killed Ziggy 100 times.
Ace Level 1.
Ace Level 2a.
Ace Level 2b.
Ace Level 3a.
Ace Level 3b.
Ace Level 3c.
Ace Level 4a.
Ace Level 4b.
Ace Level 4c.
Ace Level 5a.
Ace Level 5b.
Ace Level 6a.
Ace Level 6b.
Shoot a dead ziggy out of the gun.
Shoot an alive ziggy out of the gun.
Complete the game with your original Ziggy.
Feed Ziggy 100 times.
Eject all cockpit assets at once.
Drain Ziggy 100 times.
Eject PAL out of the eject portal.
Kill 100 enemies.
Complete a run without being hit.
Pet the Ziggy.
Complete a run without use of the HUD.
Complete a run without use of the shields.
Complete a run without creating a new Ziggy.
Charge the same Ziggy 5 times.
Complete a run without use of the lights.
Meet Eo.
Meet Jass.
See every planet.
Complete the Tutorial.
Create a Golden Ziggy.
Hit Ziggy.
Load 3 Bombs into the ammo chute.
Finish a level with a mostly broken ship.
Complete a run in zero gravity.
Have the ship freeze over.
Have the ship burn up.
Have over 9 items in the mailbox.
Level 1 - Destroy a Special Battlecruiser & Finish the Level Fast.
Level 2a - Save Eo without any damage.
Level 2b - Don't get spotted by enemies.
Level 3a - Don't let the Cosmic Express take any missile damage.
Level 3b - Collect the gems within the time limit.
Level 3c - Shoot all of the cooling tower targets.
Level 4c - Collect all of the Alare Crystals.
Level 4a - Destroy 3 enemies with a single blimp.
Level 4b - Destroy all energy tanks.
Level 4b - Let the planet be destroyed.
Level 5a - Escape the Planet in under x time.
Level 5b - Destroy x number of Battlecruisers.
Watch the Credits.