With a solid campaign and fantastic multiplayer, Shogun 2 is one of the best in the Total War series.
Where Shogun 2 really shines, though, is in multiplayer. While as before your victories and defeats mattered little towards your overall progress, in Shogun 2, each battle counts towards your leveling up and player statistics. You start with very little units available to you, then as you conqure more land on the "avatar map" ( a muliplayer campaign map of Japan) you gain access to more units, retainers, and armor for your general's avatar. In many ways, mulitplayer has become much more like call of duty, in a good way of course. It is also now much easier to join online clans, which creates a sense of compettion and belonging to a team.
The path that CA has taken in terms of faction variation is interesting- they have cut back the hundreds of different units from games like Medieval 2 and slimmed the unit roster down to only about 20 units, all universally available to all factions. While in the campiagn this has had a slight negative effect in my opinion (there is little variation between factions), it has enhanced the multiplayer experience immensly. And one last thing- that which has plagued Total War games since their inception, that has enraged an entire gaming community- is now fixed. The battle AI. While it may not come anywhere close to matching a human player, most of its eccentricities have been addressed, and it will no longer use inherently terrible tactics such as forming and reforming their lines all while being peppered by your missile units (as it did in Empire), or milling around uselessly outside a castle until the timer runs out. All in all, a huge win for Creative Assembly.
Bottom Line:
Graphics: 9/10 great, really nothing to say here
Sound: 8/10 authentic Japanese soundtrack, units and generals actually speak Japanese! However, the advisors are really annoying with their terrible Japanese accents (they speak english)
Singleplayer: 8/10
Multiplayer: 10/10
Replay Value: 10/10