system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] Say I wanted to play a holodeck version of D&D/Skyrim/The Witcher. How Immersive could it get?

Say I wanted to use the holodeck to play a fantasy role playing game. Let's say we have Worf as a paladin, Riker as a ranger, Troi as a sorceress, Laforge as a wizard, Picard as a bard and Data as DM. 

My question is how many of the games mechanics could the holodeck replicate? I can imagine that casting spells and hitting monsters would be easy but what about when the monsters or spells hit you? How you the holodeck magically put you to sleep or paralyze you? How would it tell Riker that he is so wounded that he needs Worf to use Lay on Hands? Is there even a way the holodeck could "safely" replicate the effect of getting caught in a cone of dragon's fire or being knocked prone by a tail whip?
gpt
Keep in mind that games use hitpoints because they lack granularity, you "take two damage" when your character struck by a PnP arrowhead because you just can't abstract that pain and the resulting damage that inhibits your abilities. There's two ways to go about it.

Either you LARP it and the holodeck just keeps track of your stats (maybe displayed on a board in the sky that only you and your party can see) or you do your best to play it. The computer can project a pretty convincing amount of force in addition to various environmental effects, so yes, you'd feel heat wash over you as the dragon roared and it could absolutely knock you into a wall for 2d10 if you don't dodge. The arrow sinks to the hilt.. vanishing electron by electron as it slides into you, computer releasing its control of the force fields holding it together, scratching your clothes but not your skin.

Or.. you turn the safety protocols down.. There are a large variety of compounds that when inhaled or touch the skin produce unconsciousness, paralysis, etc. First degree burns heal. You can really break ankles and wrists from being thrown into other constructs. The arrow sinks to the hilt.. tearing at your shoulder skin and the surface layer of muscles. Nothing a second or two of dermal regeneration won't fix but it hurts, a lot. (Or if the protocols are *off* it really, really hurts as it goes through to the other side and gets stuck.)

I doubt that Starfleet would let you go in for option 2. You'd have to make do with some pretty impressive computer aided effects and a healthy dose of suspension of reality. A Ferengi would just want the latinum up front.