Here is the full list of all 45 Spacelines from the Far Out achievements.
Have 5 passengers simultaneously satisfied
Acquire 30 system upgrades
Unlock 6 ship blueprints
Heal 10 sick passengers
Unlock 3 ship blueprints
Reach Gambulon V with a 5-star rating
Unlock 25 customizations
Clean a toilet or a puddle of puke 30 times
Fly a ship with all 15 classes of systems installed
Pass 5 health inspections
Get shut down by the health inspector
Run out of fuel 5 times
Unlock a ship blueprint
Reach planet Gambulon V
Reach the Vacation Sector for the first time
Exceed your ship's maximum passenger capacity
Fly 350 passengers
Unlock 10 employees
Buy all 3 items at once at Droidley's
Serve 200 meals
Buy ship insurance for the first time
Get a 5-star rating for the first time
Identify 1000 objects in space
Fly 200 passengers
Explode your ship 5 times
Reach the Gamma Sector for the first time
Repair 100 broken systems
Acquire your first system upgrade
Nearly miss a comet
Fly a total of 20000 AU
Prepare 50 meals
Fly 100 passengers
Run out of fuel once
Explode your ship once
Have your flight attendant vomit
Unlock your first new employee
Nail 200 dance moves
Complete 5 routes while playing co-op (local or online)
Unlock a customization
Customize your spaceline for the first time
Arrive at the Company Terminal
Complete your first route
Survive the tutorial
Unlock 50 customizations
Unlock all achievements