Here is the full list of all 45 Railroad Ink Challenge achievements.
Play 10 games in Score Attack.
Enter the top 30 of the Base Game Score Attack Monthly Leaderboard.
Enter the top 30 of the Base Game Score Attack Daily Leaderboard.
Complete a challenge with 10 or more friends
Complete all Goals before the requested turn.
Finish a game with a score of 20 or lower.
Finish a game with a negative score.
Finish a game with 3 or more separate Networks.
Finish a game filling all the Central Spaces.
Finish a game with a score of 65 or more, filling all the corner spaces.
Finish a game with a score of 70 or higher.
Build a Railway that stretches for 15 spaces or more.
Finish a game with a score of 60 or higher.
Build a Highway that stretches for 15 spaces or more.
Activate all Universities.
Win 3 Challenges against your friends.
Finish a game with a single Network.
Finish a game with the longest Highway and Railway of the same length.
Win a Challenge with a score of 50 or more.
Beat a friend that challenged you.
Activate all Villages.
Activate all Factories.
Finish a game with a score of 50 or higher.
Finish a game with no Errors.
Finish a game with a score of 80 or higher.
Finish a game with a score of 90 or higher.
Finish a game with 3 or more separate Networks that connect all exits.
Finish a game with a single Network that connects all the exits.
Build a Highway that stretches for 20 spaces or more.
Build a Railway that stretches for 20 spaces or more.
Finish a game without filling any of the Central Spaces.
Finish a game with a score of 65 or more, without using any Special Route.
Play 50 games in Score Attack.
Play 100 games in Score Attack.
Win a Challenge against 2 or more Friends.
Enter the best score in the Base Game Score Attack Daily Leaderboard.
Enter the top 10 of the Base Game Score Attack Daily Leaderboard.
Enter the top 10 of the Base Game Score Attack Monthly Leaderboard.
Win a Challenge against 5 or more Friends.
Win a Challenge against 10 or more Friends.
Create 50 Challenges inviting 1 or more Friends.
Win a Challenge with a score of 60 or more.
Win a Challenge with a score of 70 or more.
Win a Challenge with a score of 80 or more.
Get all base game Trophies.