Does this game need base game ?

[BIGGOURMAND]

And what are the differences between both ?

[Yasker]

There's no "base game" for B&E Blood Party. So it's a Standalone Game.

Blood Party is the Multiplayer Game and Ben and Ed is the Singleplayer game with Story-Elements.

[BIGGOURMAND]

Exactly what I wanted to know, thanks !