Changyou.com Senior Software Developer interview questions

They got my resume from job portal and conducted 1 pre-filtering round for 30 minutes and next day, they did a telephonic round for 1 hours. After That I was called for F2F interviews, they conducted 4 rounds which lasted for 8 hours including 1 hr of breaks. They 1 round managerial cum tech round on video call and 1 managerial round. After that 1 HR round was conducted for 20 minutes.