For me, it has to be Alien: Colonial Marines as it’s terrible due to inconsistent frame rate (moments the game ran smooth and times where lag was insane, even with the best hardware). Both player & enemy AI is crap since the combat wasn’t even that immersive plus Xenomorph AI isn’t as intimidating due to it being poorly implemented.
I never played it, but E.T. The Extraterrestrial caused the near death of the entire video game industry
https://en.wikipedia.org/wiki/E.T._the_Extra-Terrestrial_(video_game)#Effect_on_Atari
I don’t want to sound cliche but yeah. E.T.
And there are people saying that they immediately knew it was bad. Not me. I played it for a stupid long time. When I was 12 I would play any video game for as long as I could. And I remember screen after screen of just terrible, unimaginative redundant gameplay and wondering if I was doing it wrong…
While it certainly was a bad game it didn’t destroy the gaming industry in the US. It’s a great symbol and was one of the many symptoms (lots of bad games) that got a lot of people fired …
That’s an insane exaggeration of consequences, but that game is still uniquely boring.
E.T. was such a bad game. I still have my copy. What’s funny is that at one point I ended up with two copies because one of my friends left their copy at my house, but no one would claim it so I have no idea which friend it was (four of us owned a 2600). I can think of nothing more damning of a game than this example.
Edit: In case anyone wants to see what a surviving copy looks like, here is mine https://imgur.com/a/bcDxAbt
I played it, briefly. It was horrible. Definitely right up there for me.