The rumor is rumor no more. The final pair of Left 4 Dead 2 campaigns - known as "Hard Rain" and "Dead Center" - are real. How do we know? Because Valve told us so.
"They're legit," Valve's Doug Lombardi told VG247.
On top of that, the game's Achievement list - recently rescued from a storage closet by Xbox360Achievements.org - lists the two new campaigns, along with a slew of other unannounced odds and ends. Standouts include the defibrilator, which probably brings allies back to life, and the "bile bomb," which both intrigues and disgusts us. In a good way.
Click through the link to see the full list for yourself.