First of all, lets put this game into chronological order.
DMC 3 (young Dante) - DMC 1 (Adult Dante) - DMC 4 (Older Dante) - DMC 2 (Mature Dante)
So this game takes place between the 1st and 2nd installement of the DMC series.
The story like the others is stand alone but characters in the game come from previouse titles, Lady and Trish to be exact. So its beneficial to know who they are just from a story stand point.
The plot itself is, well kinda like the other games, people try to use Demon power, they fail, they need beating. But this game has a love interest between Nero and Kyrie which drives his involvment. Dante is just there for some fun, oh and to get back not 1 ..but 2 swords that one of which ,'Sparda', Trish 'missplaced' :P . The other was being used to seal the Devil Gate (Virgils Yamato sword from previose titles).
Unlike the other games, except maybe DMC 2, you don't play Dante as much as the other character Nero; there are 20 missions in total. Which considering Dante is the main character of the series does seem a little odd.
However, thats not to say Nero isnt a fun character to play, the oposite infact, he's very fun to play, specialy with his Devil Arm.
Game play mechanics for Dante include 'styles' i.e sword master, gunslinger etc and he gets 3 different melee and 3 different ranged weapons to play with. Nero does not have these options but his Devil arm makes up for that and he also has a gun and his sword.
All in all, like most games i end up playing and reviewing i find this a little to short. This game in particular i tried to take my time with, but i still managed to complete it on its highest starting difficulty in 12 hours ( for me that 2 days plus a couple hours the day i got it).
Though after 1 play through things, like Bloody palace, are unlocked for a challenge, and an extra 2 difficulties (1 for Consoles) are unlocked which allow you to play through the game again with upgrades from your 1st play though. So that will add replay value to the game.
It is imo that the majority of a games data should be used with the main story/plot of the game so that u can spend up to and above 24 hours to play through the game just once not including bonuses/secret/achievment/challenges etc etc etc. Alass most games currently ,and in the past handfull of years, and gone with the 50/50 route ( or more in favor of the later) . Shorter story, longer replayability.
Finaly, for the PC this game has some nice graphics, Max out your settings, including 16xQ AA and you will be hard pressed to say they could have done better.
Overall i score this 5/5, deffinatly worth getting for the PC over its console counterparts.