Here is the full list of all 37 RAILGRADE achievements.
Lay 128 tiles of track
Run the smallest train possible
Ride a train traveling over 32 tiles
Produce 64 Energy from Geothermal
Complete a region with only 1 train
Finish a mission while losing money
Build your first train
Finish the campaign
Construct 4 new Deer
Lay 1024 tiles of track
Salvage 32 tiles of track
Salvage 1024 tiles of track
Construct 32 branches on a single region
Lay 1024 branches
Salvage 32 branches
Construct 16 trains
Construct 128 trains
Construct 512 trains
Ride a train traveling over 128 tiles
Produce 1024 energy
Produce 1024 Crude Oil
Launch 16 WorkRockets
Establish a region generating 4096 profit per minute
Upgrade industries 256 times
Upgrade water pumps 32 times
Grow a city to max level
Upgrade an electronics fab to max level
Upgrade 10 coal mines to max level
Upgrade 5 incinerators to max level
Run a single train of over 16 length
Deliver 2048 units of Steel
Deliver 2048 units of water
Export 64 Energy per minute from an Export Dock
Export 32 Mainframes per minute from an Export Dock
Finish the first optional side mission
Construct 64 new Deer
Lay 8192 tiles of track