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