The episodic one is definitely worth a play, the gameplay may not be for everyone but its a fantastic game. It has an awesome story that makes you actually care about the characters. Survival Instinct on the other hand has a bad almost nonexistent story which character you don't care about. The zombie AI is just terrible and the action aspects of it are very clunky. Lol you can jump up on a car and pick them off one by one usually and when its not that its simply shove them, knife in the back of the head, repeat.