Here is the full list of all 10 Intergalactic Bubbles achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Survive all Medusa levels.
Get 3 stars in all Andromeda levels.
Survive all Pillars of Creation levels.
Get 3 stars in all Pillars of Creation levels.
Survive all Andromeda levels.
Get 3 stars in all Medusa levels.
Survive all Orion levels.
Get 3 stars in all Orion levels.
Survive all Milky Way levels.
Get 3 stars in all Milky Way levels.