Earn a Star with each Specialist

In Classified, shatter 115 zombies in a single game

In Classified, use a teleporter 7 times in less than a minute in a single game

In Ancient Evil, survive the first 20 rounds without leaving the interior of the Temple of Apollo

Kill 50 enemies while using Overdrive.

In Blood of the Dead, reach Round 20 without leaving the West Side of the island

In Blackout, unlock Bruno, Scarlett, Diego, Shaw, Dempsey, Takeo, Nikolai and Richtofen

Kill 10 enemies or drones while affected by a sonic blast.

Finish the hoverbike sequence without hitting any walls or obstacles and taking no damage in "Aftermath."

Go through 20 gun drops in one-armed combat in "Captured."

EMP 10 enemy aircraft out of the sky with the hovertank in "Bio Lab."

Kill 4 enemies with a single smart grenade.

Melee an enemy so they fly off the side of the ship in "Armada."