Simulation Games
Games about running a system: a salon, a clinic, a household.
Simulation games give you a system with rules and let you find the edges of it yourself. In this category that usually means managing something with several competing needs — a grooming salon with a queue, a veterinary clinic with patients in varying states, a household where every action costs time you could have spent elsewhere. The appeal is not winning but noticing: which lever matters most, what happens when you neglect one meter to protect another. These are all browser-based and free, so experimenting costs you nothing more than a reload.
1 game in this category.