Dragon Age: Origins- Was excited to get this after all of the acclaim it was getting, and was thoroughly disappointed. It felt like a game that belonged on the PS2. Menus and systems were awkward, combat was lame, and the graphics were really awful considering the era.
STALKER- Like Sean, I really have tried to get into the STALKER games. I just can't do it. I don't know why either, because first person open world RPGs are one of my favorite game types.
Far Cry 2- Funny one because some sites gave it awful reviews, but it received a ton of glowing reviews from lots of places. Probably the single most annoying and frustrating gaming experience I've ever had. FC2 was a joke.
For those of you saying Half Life, you must either be young or didnt play it until recently. When HL1 was released it was INCREDIBLE for its time.
I would say the same for the stalker part, I tried getting into Shadow of Chernobyl many times and always gave up, but when I tried Call of Pripyat, it all changed for me...it's so much easier to get your foot in the door with that part of the series