Firaxis does an outstanding job of remaking a classic strategy game.
Xcom is a remake of a 90s pc game that has a pretty dedicated following, and rightly so. Firaxis remake of Xcom updates this title in all the right ways. Graphics are quite nice while still retaining the destrucability of the environment. Gameplay is streamlined without dumbing down. Music, sound, and voice acting are all very well done. The story line sucks you in and really gets you attached to your soldiers, especially as they rank up. There is even a step by step tutorial to get those gamers that may not be familar with turn
based strategy games up to speed.
There are a few minor glitches (mostly graphical in nature) and it is a bit odd that your multinational force speaks entirely in north american english. Nothing that truly detracts from the game.
Xcom : Enemy Unknown is a definte must play. Firaxis has made the best strategy the 360 has ever seen and very likely 2012s game of the year.
EDIT: After a much more time with Xcom I have to say I am sorely dissappointed with this game. The initial impression is very good but after scratching the surface there are many many problems with this game and one in particular that can not be "patched" out.
The glitches and bugs with this game are almost entirely within combat and most of them will be to the detriment of your team. Line of Sight issues being the most damning. While Overwatch can be abused to shoot through the environment not being able to shoot at an enemy that is right infront of you is extremely frustrating. Viewing issues while in buildings or landing craft will cause headaches for many a player. Then there are the "warping" enemy problems that will drop 1 or more bad guys in the middle of your team without any warning. Then of course there are a number of graphical isssues that dont have any impact on gameplay but none the less are frequent and annoying.
All these things I would overlook but the biggest problem is that the percentages that the game gives you so you can make a determination on how to proceed ARE A LIE. The hit or miss on a shot is PREDETERMINED and the AI knows exactly where to go to avoid getting hit while at the same time not getting hit. The difficulty setting only changes how often they choose the "right" spot. There are many that will say "You dont understand %'s then" I understand them just fine. I also understand that 65% isnt 100% and through my own experiments have found that 100% of the time I miss or hit on a given shot regardless of what % they have given me or how many times I reload the game to take that shot.
Firaxis has borked the most important part of this game the STRATEGY part and I cannot recommend this game to anyone.