Here is the full list of all 13 Hyper Train Corporation achievements.
Improve the passenger comfort
Increase the speed at the lines
Increase the capacity of a line
Build the Atlantic Ocean tunnel
Connect all the cities
Maximize all the characteristics of one line
Let 10 line accidents happen at the same time
Make your first billion
Create a line to connect the remotest cities
Connect the most closely located cities
Maximize the passenger comfort at 20 lines
Maximize the speed at 20 lines
Maximize the capacity of 20 lines