Totally. Third edition D&D (and its continuation Pathfinder 1e) is amazing for doing the most insane things you can come up with. So many janky combos to be had, with an utterly absurd amount of choices, and characters tend to make more build choices each level than a 5e character does in their entire career. Downside, it’s less newbie-friendly because that many options can be overwhelming. But it’s perfect for those that tried 5e and found it too shallow.
Fun fact about going below 0 HP: Third Edition D&D tracked that. At 0 you were staggered, below that unconscious, and at -Con Score negative HP you died.
This being D&D 3.x (3.0/3.5/Pathfinder 1e), there were abilities that extended that limit, abilities that let you stay conscious below 0 HP. I’ve seen someone play a build that was always at negative HP, with a limit of something like -300 before dying, and got bonuses for being in the negatives.
Nah, even the modding community declared that a lost cause.
Skyrim.