1. No dragons
2. Humans are the only human level intelligent species
3. Can't use magic.
4. Only allowed to carry a few potions, and the more equipment or potions you have, the slower you become, easier to become over-encumbered. Your amount of how much you can carry will not increase as you increase lvls.
5. No vampires or werewolves. If there are any intelligent creatures that attack villeges or try to eat people, they can be cannibals.
6. If you die....that's it for said character. You can still save your progress, however if said character is killed in anyway, all save slots for said character can not be accessed. You would have to make a new character.
Would you play a more realistic game like this?
Of course if there are no dragons, then it kind of destroys the main quest. However some other quest could replace it? Perhaps stop some Thalmor invasion? Sure these Thalmor wouldn't be elves....since elves are against realisim, instead the Thalmor can me made up of another race of Man, who's skin is yellowish/golden color, and despise the other human races (nord, imperial, redguard) for some reason.

I've no interest in medieval games.