This game has nothing to do with DS series. Only good thing about the game is the gameplay graphics.
Dialog and cinematic graphics are horrible. Voice acting is bad and story is not engaging at all, feel free to skip through all the dialog, you won't miss a thing. Party is limited to 2 characters and there are only 4 characters to choose from.
Combat is boring and repetitive, there are almost no side quests and the quests you do are always conveniently put on your path making this game the most linear RPG I've ever played. Also RPG elements like character development are almost non-existent, as there are more levels than options so you'll eventually pickup everything your choice is limited to the order you take them.
Sad it had to end this way Dungeon Siege.