Argh, I'd feel terrible about making a game about The Castle considering that Kafka told Brod to burn it on his death, and Brod was a jerk and went against Kafka's wishes. If anyone had any respect for Kafka, nobody should even read it, let alone make anything based on it. Brod is the greatest villain in literature.
Nah, you got it all wrong. If his works hadn't been published, then today nobody would remember or respect him as one of the most influential writers of the 20th century. So saying "If anyone had any respect for Kafka, nobody should even read it" is completely backwards: if nobody had read it, then nobody would have respect for him in the first place.
The guy was basically depressed all his life, it's somehow understandable that he didn't want his work to get out into the world. But Brod saw his genius and immortalized him. It would have been a crime against literature to burn the manuscripts.