Call of Duty: United Offensive is the first and only expansion pack available for any game in the Call of Duty series at this point. It offered a brand new campaign and also a variety of new features, maps, and multiplayer modes. Call of Duty: United Offensive requires the original game to play, it is not a stand alone expansion pack
The story follows a similar system as it did in the original Call of Duty. It follows three soldiers through various battles in World War 2. One of these is an American named Scott Riley, a British soldier named James Doyale, and a Russian solider named Yuri Petrenko. The story also follows the 'Call of Duty mold' as the game is mainly made up of well known and famous battles in World War 2. In United Offensives players will find themselves thrown into the Battle of the Bulge, The Liberation of Sicily, and a variety of others.
Call of Duty: United Offensive offers a variety of new features which were intended to build on both the singleplayer and multiplayer aspects of the game.
Some of the new additions to both multiplayer and singleplayer alike are the additions of vehicles and new weapons.
The game also received a massive overhaul on the multiplayer in the game. Many players considered the additions alienating to Call of Duty fans as it brought the game into a more Battlefield-esque style of gaming. Many of the maps added were larger then before like Foy and Sicily which were built for the new modes.
This is your standard capture the flag mode where both teams compete to defend your teams flag or capture the other teams flag. This mode was a standard at this time as it was a mode featured in many other online games such as Unreal Tournament.
The goal of this mode is to take over all the control points and defend your own held points from capture. This is similar to conquest mode as seen in the Battlefield games, and would later see precedence in all future Call of Duty titles.
Base Assault is a variation on domination where instead of capturing the bases your goal is to destroy it. This is possible through the new use of vehicles or bazookas.
Call of Duty: United Offensive also offered a new rank system. It was not a persistent rank system though, instead in each game you start off at the beginning as a private. Throughout the game you will rank up based on your kill count or score. In turn this will earn you perks like being able to call in artillary, addition ammo, or satchel charges. There are five ranks:
These can be attributed to the primitive forms of killstreaks seen in the later games in the franchise like Call of Duty 4, World at War, and Modern Warfare 2.
As displayed on the back cover of the box (Please note that only the minimun requirements are given)