Here is the full list of all 18 Talk to Strangers achievements.
Make 16 sales in multiple playthroughs.
Reached the daily goal 10 times.
Fail to make a sale.
Reach depression level 10
Reach rage level 10.
Survive five days.
Get a negative balance with your finances
Use all items at least once
Reach at least 5 different endings.
Visited all "houses" in the map.
Reach the ending.
Reach the true ending.
Sale at the Mansion during the morning or noon.
Make a sale at the house where time is not a constant.
Make a sale to the Unemployed.
Be electrocuted on a bell.
Make one of the happy endings.
Make a sale in every home at least once.