User blog comment:Solowing106/Tunnels/@comment-1824272-20120802190142

The tunnel in Sudentor for Ace Combat 5 is brutal. First off, you have to deal with the twists and turns as well as the shutters opening slowly, along with Hamilton at your butt firing missiles at you (depending on how fast you're going, but if you go too fast, it'll be very tough to maneuver). But then you have to break right to avoid Bartlett's plane halfway through. THEN the shutters start to close, and planes are firing at you from the front too! And the worst part is some weird machine near the very end of the tunnel that you have to get a perfect angle for to make sure you get through unharmed.

Fortress Intolerance (AC2) and Megalith (AC04) are very easy. Geothermal is a joke. But Fortress Intolerance (AC3DS) in Extra Mission 04 is very... umm... well you can find this out for yourself. :P

Avalon in Ace Combat Zero depends. This is up to the mode you're playing on (harder difficulties have less time allotted to destroy the control facilities) as well as how much of an idiot you choose to be while inside the tunnels. :P