Here is the full list of all 40 Train Life: A Railway Simulator achievements.
Hire an Employee Driver in a career
Own a total of 25 non-default locomotive parts
Fully upgrade a locomotive with new parts
Buy and equip a new locomotive part
Purchase a new locomotive in a career
Complete all Towing scenarios
Complete all non-tutorial scenarios faster than the estimated time
Complete all Shunting scenarios
Complete all Extreme Cargo scenarios
Level up to the Mid-level rank
Level up to Junior rank
Complete a non-tutorial scenario faster than the estimated time
Level up once in a career
Drive from a station in one city to a station in a different city without being fined (this must be done in a career or scenario)
Complete all tutorial scenarios
Upgrade a city to level 2
Upgrade a city to level 3
Have 10 Employee Drivers hired and on a task at once in a career
Earn a total of one million in cash in a single career
Earn a total of ten million in cash in a single career
Level up all cities in the central region to level 3 in a single career
Level up all cities in the Southern region to level 3 in a single career
Level up all cities in the Eastern region to level 3 in a single career
Level up all cities in the Western region to level 3 in a single career
Level up all cities in the Northern region to level 3 in a single career
Unlock all stations in a single career
Level up all cities to level 3 in a single career
Deliver to a city that has an active delivery bonus for what you're delivering (this must be done in a career)
Deliver a total of 1500 cargo wagons in a single career as a company
Deliver a total of 3000 units of passengers and postage in a single career as a company
Level an Employee Driver to level 25 in a career
Have 3 Employees at level 25 in a single career
Level up to the Senior rank
Level up to the Principal rank
Level up to the Master rank
Reach level 30
Complete a cargo contract with a time bonus of greater than 1.5x (this must be done in a career)
Deliver at least 1 wagon of a Tier 3 good in a career
Earn at least 15000 XP from a single contract or delivery
Complete a cargo contract of more than 8 wagons in a career or scenario