United Offensive is a DLC/expansion pack for the original Call of Duty. It was developed by Gray Matter and first published by Activision in 2004.

Call of Duty: United Offensive opens with The Battle of the Bulge, aka the German Ardennes Offensive of December 1944, and does a good job of simulating the confusion and panic felt by many on the front during that battle. Not to mention, the bravery.

You’re playing as Corporal Scott Riley and your first real test is your second mission – unplanned – which involves a rapid retreat from German tanks and infantry, in a Jeep, as its rear machine-gunner. While this is an exhiliarating ride, it’s also pretty challenging, trying to make it to the end-of-level checkpoint. It took me a few tries to make it through. After that, the game doesn’t slow down, and you participate in the entire Bastogne campaign, as depicted in HBO‘s award-winning Band of Brothers.

As in Call of Duty, in United Offensive you also get to play through three campaigns – American, British and Soviet – once again in that order. In the British campaign you play as Sargeant James Doyle, who is rescued (then recruited) by the S.A.S. in Holland, and then goes on to undertake a mission to destroy some German cliffside cannons (much like in the 1961 film The Guns of Navarone). In the Soviet campaign you play as Private Uri Petrenko, participating in the Battle of Kursk and the defence of Kharkov.

Multiplayer CoD now has a ranking system, so that the higher in rank you climb, the more in-game bonuses you get, and also adds three new multiplayer modes to the game: Capture The Flag, Base Assault and Domination.

If you buy Call of Duty on Steam, you also get United Offensive – as a standalone game – as part of the package.

More: Call of Duty: United Offensive on Wikipedia
Steam: Call of Duty on Steam