Mechwarrior 2 - Jade Falcon - Mission 4 - Bone Machine
I would say this is the first mission that's challenging, took me several tries to find the proper mech/weapon configuration for this one. I have used a PPC only Mad Dog, this seemed to be the best choice for me as the enemy is coming from 360, and sometimes even from above... and there is a lot of close quarter battle in this mission.
I was particularly upset at my wingmen, he was pretty much a useless shite in this one.