timppu: I recall there are some (PC?) RPGs where that actually happens. You play long enough, you start becoming weaker etc. due to your character's age.
OldFatGuy: I know with certainty
that this one has that bug, err.. feature, as well as RL. Personally, I consider it a bug. :)
I was almost sure it would have been e.g. Wizardry 7/Gold, but it was probably Darklands, as you said.
https://www.gog.com/forum/darklands/dying_of_old_age/page1 I started playing that game a long time ago but didn't really get far, I guess I found some more interesting games. No reason to continue that game anymore, my character must be probably 150 years old by now and can't lift a finger against the enemies.
(Actually, now I remember that, apart from not really understanding what I was doing in the game, I was really put off by the odd fonts used in Darklands, making big walls of text hard to read? Maybe I have to recheck if that was the case, but I recall being unhappy of the "fancy" low-res font, which felt gimmicky and irritating.)