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.
It really deserves the Disco Elysium treatment. Yeah, the eponymous anti-hero gets his kill on throughout the whole story, and that’s tempting to build a game out of; standard revenge plot stuff. That said, there’s way more on offer here. How about a detective story that follows a murderer that’s already dead? Or, maybe you start off not knowing you’re dead and puzzle that together as you go. Or perhaps you’re constantly crossing paths with said detective, solving your own mystery, always a step behind the shadow of your dead friend?