I'm writing a video game in which the player's body temperature is a mechanic. From what I understand, human perception of temperature is highly dependent on the change in temperature as well as the absolute temperature. However, I can't find numbers, and that's what I need. Specifically, I need temperature and Δtemperature values at which a person would feel "warm", "uncomfortably hot", "extremely hot" and "lethally hot", and similar values for cold. Does anyone have relevant data? I understand, of course, that numbers tend to vary greatly when dealing with living beings- I'm asking for ballpark averages. Of course, if I've completely misunderstood how this works (always a likelyhood), feel free to correct me.