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