Stranded & Naked: About 'Unlock All Observe Events'
Short answer
Suggested fix (unconfirmed): Unlock all observation events within the same saved game, including any nighttime events triggered by unlocking the last heart. Make sure you haven't missed any.
The problem
I've unlocked all observation events,but the achievement hasn't unlocked.
No confirmed fix yet. Players suggest: I drop her to 3 by denying food and then go two days with food until she is back at 7 before dropping it again and it works.
Suggested fix (unconfirmed): Keep Megan's satisfaction level at 5 and ensure all sexual acts are performed and set to 3/3. If the corruption choice appears locked, click it again to bypass the display bug.