The recently release content is available via Valve’s Steam distribution service and come packed with the following features:

Three brand new weapons, which can be found in the armory:
– Silenced Shotgun
– Sawed-off shotgun
– Crossbow

Two new vehicles, which can be found at various locations throughout the the game in place of cars or other vehicles:
– Unimog (big truck)
– Quad

Five new Multiplayer maps:
– Cheap Labor
– Last Resort
– Lake Smear
– Fort Fury
– Jungle Seizure

All the new weapons and vehicles will be available in Single-player and Multiplayer modes.