Devil May Cry 4 is actually the third game chronologically speaking (taking place between the original and second games [which means
Devil May Cry 3 is actually the earliest events in the series]). Instead of following the series' main protagonist, Dante, this version gives you control of a new hero, Nero. But fans of Dante and his weapons shouldn't have too much of a problem since you will get to play him for seven of the 20 levels.
Nero is a member of a cult known as The Order of the Sword. This group apparently worships Sparda and is getting ready to perform a ceremony that will fulfill the group's purpose. But just as the ceremony begins, Dante breaks into the chamber and murders not only the Order's leader, but also many of its members. Nero is, of course, charged with finding and bringing in Dante.
As Nero, you wield weapons like the Red Queen sword, Blue Rose revolver and Devil Bringer (which is actually Nero's right arm). Both the sword and gun should feel familiar to existing DMC fans, while the Devil Bringer is used to throw enemies around or pull them towards you. This power's ability increases when you've dealt enough damage to fill up a meter and release the Devil Trigger.
While playing as Dante, many of the abilities players have gotten to know from the previous games come back through, including Dante's ability to use weapons that were used against him in boss battles. However, some of Dante's old arsenal does return, such as the Rebellion Sword, the Ebony and Ivory handguns and Coyote-A shotgun.
Another change to the series is the use of Proud Souls, which are granted to the player based on how your score is in a level. These Proud Souls are used as currency in the game's shop that will let you buy upgrades and abilities.