Here is the full list of all 19 Highway Blossoms achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Checked out the credits on your own time
Completed Highway Blossoms on Extreme difficulty
Turned on Goofball Mode
Let's hope you don't ever again
Finished the story
Finished the epilogue
Got lucky at blackjack
Unlocked every journal entry
Now you're back on track
Didn't find the second piece of treasure
Found the first piece of treasure
Got a copy of the miner's journal
Checked out the guest art section. Now all it needs is a glass case.
Started a new game
Tried out the hi-contrast textbox. Who knows, you might like it!
Set the character speed below 10 characters per second
Turned on skip mode for all messages
You know what you did