Here is the full list of all 12 Tiny Rails achievements.
Travel 1,000,000 km/622,000 miles.
Upgrade 50 cars of any rarity.
Earn 1,000,000 gold.
Earn 25,000 gold by selling cargo at Markets.
Visit 250 Stations.
Upgrade 100 Stations.
Take 1,000 Passengers to their destinations.
Buy 400 cargo items from Markets.
Collect 45 train cars of any rarity.
Collect 30 rare train cars.
Purchase 75 train stat upgrades.
Take 250 VIP Passengers to their destinations.