What is the most difficult level/mission you have ever played?

[Hynad]

As Rol said, games from the 8 bits era were brutal.

Games like Ghosts N' Goblins, the original Ninja Gaiden and Battletoad come to mind. xD

But among my favourites were Contra and Gradius. The later levels were very hard if you didn't use the famous Konami code.