Call of Duty 2

This Infinity Ward follow-up to 2003's critically acclaimed Call of Duty pushes farther across the European Theatre of World War II, with missions spanning the desert fighting in North Africa to the tank assaults on the Russian front. The sequel boasts graphical enhancements and significant improvements to artificial intelligence. Computer-controlled teammates act and react individually, and the game's contextual "battle chatter" system lets players know exactly what's on their minds. Enemy squads are likely to have learned a few new tricks as well. The game's single-player campaign is designed to allow individual players to progress through the missions in the order they prefer. Multiplayer warfare is supported for Internet-connected soldiers.