The hardest video game you have ever played

[Biomac]

I don't remember to have seen a topic like that, but if there is, moderators can feel free to remove it.
As the title says, I was wondering what's the hardest video game you have ever played. Mine is Super Mario Bros: The Lost Levels.

What's yours?

[KingKovu44]

Star Fox 64

[Woeler]

QWOP

You'll never beat it

[DGFone]

X-Plane 10.

Real World physics + bad frame-rate + frame-rate based calculations = bad combination.

[KopsTheTerminator]

QWOP

You'll never beat it

^ THIS.

...I always end up getting a negative score... FML

[Biomac]

Ok, I thought that Angry Birds is very tough and long too if you want to finish it at 100%

[Nukascar1]

The karate kid

[Tekir]

QWOP

You'll never beat it

^ So true. XD

My best score is around 20 or something and I never knew how I was able to do that, lol.

[Misiziri]

Twilight Princess is extremely difficult for me, I can't get past the Forest Temple and I've been there for hours upon hours. I had to look up cheats to help me.

[Jiirani]

Ehm, Ocarina of Time was pretty difficult.