There is nothing inherently distinctive about terrain, and geography, and architecture, in comparison to the dodginess of Orcs vis-a-vis particular sorts of attacks, that means that one method of establishing authorship and resolving actions is inherently apt to one and not the other.
I've never played in a LARP, but it feels like having an npc orc be differentially dodgy based on the pcs choice of attack would be easier to implement than having new rooms or obstacles appear because the in-character player remembered them being there.
In a play, are the parts for each actor of a different type than the stage descriptions?
When playing Minecraft, is playing in survival mode effectively a different game than playing in survival mode except that you are allowed to pop over to creative and spawn new mobs or new structures when you want?