Wow, the last 3 named are some of my favorites, Grim Fandango going back to before there was a Playstation of any kind. You youngsters are harsh.
For me, lots of bad ones to pick from, but probably The Bunker. Should have been a 30 minute platinum, but turned into a 2 hour one I think, because it was so ... lacking ... that I got really sleepy and had to take a nap. Good idea, just poorly executed. And there's a reason we all collectively decided back in the 90s that we should no longer have full motion video in video games, and THAT was with Mark Hamill, much higher production videos, Kilrathi and the whole Wing Commander awesomeness. FMV ruined it, even with Mark Hamill to lessen the damage, so everyone abandons FMV in a hurry. So this studio decides to bring it back?