If dark matter is fully explained by such black holes, their most likely mass, according to some theories, would range from 10^17^ to 10^23^ grams—or about that of a large asteroid.
In case this doesn’t tell you a lot, 10^17^g is half the weight of Mount Everest, and 10^23^g is 4x the weight of the Antarctic ice shield.
Morrowind was also an almost unplayable buggy mess when it came out.
One of the first places you go to if you do the main quest is the Balmora mages guild, and when you went downstairs in the release version, you regularly fell through the floor.
And alchemy, crafting and spellcrafting were so broken you could just spend half an hour on it to turn yourself into a god.
Pioneer is a great remake of the original Elite Space Sim.
It simulates the entire galaxy (core systems are hand-built, everything else procedurally generated), allows landing on planets, trading, combat, etc.
It features the original game’s Newtonian physics, so actually arriving safely at your destination is a challenge in itself, similar to flying in Kerbal Space Program. But the HUD gives you all the info you need for that.