For a long time, the only thing that mattered in the game was the quest. You had to find the secret passage to get to the next level. You were given a map that you had to follow. You could not go back once you had opened the gate.

Devil May Cry Weapon Pack is an addon for the game that allows you to choose your character's weapon and skins for more personalized gameplay. You will be able to change your weapons and skins as often as you want. The addon is a mod, but it is not a stand-alone application.