The game really isn't the type of game that needs a dedicated server.

- Your co-op in this game is limited to you and 1 other player.

- Game length: While this game has plenty of length to it for a single-player game, it would be considered short by most multi-player adventure RPGs that require persistent worlds.

- Also, the content/monsters in this game don't respawn, so if one of you were playing and the other wasn't, the other would simply miss out on content of the game.

- If you were playing it while your friend wasn't, you'd likely be significantly ahead of that player on your next play session.