Train Sim World 2

*Notice: This is somewhat lengthy. I would recommend stepping away after step 6 and let the game go by itself until the train reaches it's destination at Brighton. Also, try plugging in your controller to your xbox that way it doesn't turn off while you're away.

1. Select London Commuter from the main menu
2. Go to Explore on Foot (Does not matter the date and weather)
3. Select London Victoria @0820
4. Load the map and head to Platform 19
5. There should be a train at that platform for you to board that is headed from London Victoria to Brighton. If the doors are not open, open them and then close them once inside. (If the train says 'Not In Service' on the destination board don't worry. Just board the train and it will eventually start moving)
6. Take a seat and let the game roll until the train reaches it's destination at Brighton.

If done so correctly the achievement will be at 50% meaning you rode 50 Miles already.

Repeat these steps once more and the achievement will pop.