Tower Watcher Trophy
Climb the watchtowerMISSABLE
At the end of the workday on September 6th, Kay will leave you a voicemail inviting you to hang out at the watchtower the next day (September 7th). Agree to meet with her and you'll automatically find yourself at the watchtower the next morning. Exhaust all of the dialogue and the watchtower will now be marked on your map.
Revisit the watchtower at any point before the end of the workday on September 13th and climb up to the top of it to unlock the trophy.