GameHow
The Sims 4You can give a Sim the Loner or Socially Awkward trait and build a private home room by room.
The LongingYou play as a small creature called a Shade who spends 400 real-time days alone in an underground cave.
UnpackingA wordless puzzle game where you unpack boxes into bedrooms across life stages with no timers or dialogue.
Introvert: A Teenager SimulatorA narrative indie game on Steam where you play five days as a quiet new high school student.
LifeSimYou live in a real city on a 3D map, text people in your own words, and choose which invitations to accept.