time for an in-depth case-study on...
The Unlikely Adventures of Edd Schiester #1: Escape from a Large Cave (1992) by
D. Harvey &
T. S. Kong.

Edd Schiester is a shareware point & click adventure game, featuring a couple o' dozen rooms and a custom-written engine. it came on one floppy disk
the disk can be downloaded from this page (DMS format, requires an Amiga emulator to run):
17Bit PD Library - Disk #2207 
the story so far:
Edd Schiester has fallen into a network of mysterious subterranean catacombs and must find his way back to surface freedom
the first thing you may notice is a couple of unusual verb buttons on the interface. unlike most any other point & click, you can
Drop any inventory item where you stand, and pick it up again later. this is never useful
there is also a button for
Violence!. this allows you to murder non-player characters (the murder weapon is not listed as an inventory item)

when murdered, the victim's sprite does not change. there is no animation at all. instead the words
"Scree,scree,scree" appear at the top of the screen (not sure whether this is meant to be victim screaming or
Psycho violin screeches) and the NPC's mouse-over name changes to mention that they are now dead
also whenever he walks into a room, there is a rare chance Edd will utter one of a few random phrases. some advertise
"drink pepsi" and
"eat at pizza hut", there are old classics
"worship satan" and
"kill your parents"... then there are some genuinely nasty & troubling ones, like
"go out and brain a faggot"
so anyway... what do you actually need to do in this game...?
well, along your travels you will meet a man who lost his
dog. if you can reunite them:

...he will reward you with a
golden key, which you can use to unlock this door:

...but, what is waiting for you on the other side??

yes...
"LOOK" indeed... gaze upon the depth of your failure...
when you are returned to the game, you are still outside the exit. all your inventory items have been removed. the game is unwinnable. there is no save/load or restart. you have no option but to turn off your computer in disgrace
if you are tempted to hunt around files on the disk looking for hints there is only further indignity for you

i will maybe do another update about Edd Schiester in the future...
in the meantime here is a map I made of the game's locations:
Edd Schiester #1 map