Played it again just once for one new achievement.

✅ Cleared Spring course
✅ Cleared Summer course
✅ Cleared Fall course
✅ Cleared Winter course
✅ Cleared Master course

🎇 Game beaten!
⏰ Time Taken: 4 hrs
💀 Loses (DC): 67 (estimated)

🏆 All achievements earned

Update: (06/14/24)
Moved the "Mastered" tag to today's date due to additional achievements by patch.

Started playing at midnight. 🌙

Technically, you can play the game on the go while in offline mode. Unfortunately, if you want to earn achievements properly, you need to be in online mode in order to earn them. Another game that doesn't like me to do achievement hunting offline.