I'm usually pretty good with this. However, I'd choose
Two Worlds. There had to be something that aggravated me to quit that early on. Maybe because I realised everything was finite... I found it depressing.
The Amazing Tea Alligator said:
Oblivion after the first bit when you realise the only good part of the game was Patrick Stewart.
You know, they really should have made him a ghost that follows you around dispensing wisdom. Oh sure, it's annoying, but you'll forgive him because he's Patrick Stewart. Also, imagine the banter, it would be worth it.