If you played Return To Castle Wolfenstein and all the way through Medal Of Honor and occasionally wished there were a few good men to give you fire support, this game is the answer. After playing the two games mentioned above I was really bored of the "average-shooter-concept": -one against all super evil stupid enemies-. Suddenly there was CoD and amazed me not only with fresh graphics, great facial animations and lip sync, as well as a quite clever AI; it finally brought in something the 1st person shooter genre had been missing for so long - AI comrades for your support. That's what makes CoD so special, and as the tagline promises, you're never alone. But unlike one might believe on first hearing this, friendly AI isn't stupid cannon fodder. They take and give cover, flank and even secure corners around which the enemy might be lurking. Of course they're no replacement for real human players in a multiplayer deathmatch, but for the single player experience, they're the best by far and they're with you all the way through the game (not like in MoH, where you get that mincemeat in uniform to support you ;-)) The storyline is based on historical battles, the tension while playing never gets too stressy (though sometimes hectic), never giving you the impression the developers overshot their aim. For the ego-driven "lone wolf" "rush-rush" players, games like MoH & RTCW might be first choice, while the more cautious "tookmethreehourstokilloneguy" players might choose Brothers In Arms (I call it the "lame" version of CoD/UO/CoD2 ;-))), or something like Splinter Cell, Call Of Duty stands right in the middle, giving you the best of both worlds, and this also applies for the expansion pack "United Offensive" and Call Of Duty 2.