Black Ops Veteran. That one mission with the Rocket launching, and you have to use a Valkyrie to shoot it down. The part that pissed me off the most was near the end. Hall way, after hallway, after hallway, filled with very angry Russians. Right as i'm near the end of the level, after repeating that section for the umpteenth time, these Uber Russians with gas masks rush me. Even worse, you have to get out of cover and go ahead to trigger them. So now i'm trying to inch forward, and rush back to the crate just before all the steam, and hopefully my teammates will help pick them off.
Nope. They just stand there, looking like idiots, while I gotta face off against Gas Mask Spetsnaz. Hated that level.
The Khe San level with the napalm barrels was a cakewalk compared to this one.