What was the most challenging game you have ever played?

[dtewi]

I only play fun games, but Trauma Center: Under the Knife was a bitch to beat all the X Operations with a single stylus. I mean, the damn first one took me nearly 20 tries as well as the seventh.

I also did Silver Surfer on an emulator, but I gave up after 10 minutes.

Elite Beat Agents was difficult on Hard Rock, but easier than Trauma Center.