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