Windows XP/Vista (Modern systems may require compatibility mode) Processor: 3.0 GHz Pentium 4 or AMD Athlon 3000 Memory: 1 GB RAM (XP) / 2 GB RAM (Vista)
This system tracks your progress across all game modes. Experience earned in the campaign unlocks new weapons, gear, and clothing that can be used in multiplayer, and vice versa.
The fan-favorite mode returns, challenging players to clear out maps filled with enemies either solo or with friends. The Setting