GTA4. I got to the end where Nico had to kill that mob boss but I could never catch up to him. I also semi-cheated to finally beat the ending to BioShock Infinity because I kept losing. Turns out the trick is to setup a bunch of Return to Sender traps along the base of the ship's power source. Would have never guessed this.

Witcher 3, I sold my GOTY edition game after I realised I didn't have the time I needed to dive into it. I think it would have been the perfect game to get into now :/

Not ashamed but of course if I start a video games I want to beat it and sometimes I cannot do it and that I don't like. Here is a list of games that I started, played a long time or almost to the end but never beat: Xenoblade Chronicles, Shadowman, Bravely Default, Trails in the Sky, Riviera: The Promised Land, Final Fantasy IV.

F-Zero GX

Not sure if I ever beat F-Zero X on Master. I think I've come close at least.

I'm not really ashamed about any of them, I probably just wasn't into them or something, or maybe I sucked at them. OK I sucked and didn't beat Dark Souls but I'm not ashamed, I own my suckiness

ugh, that's a tough one.

Guess I'll go with Lethal Leauge Blaze. Still didn't beat the last level of the campaign.