Katana ZERO - Psychotherapy - Secret boss fight

This video shows the boss fight against the psychiatrist that triggers the achievement “psychotherapy“ upon completion: defeat the psychiatrist's final form. Here are the triggers that might help you provoke this fight: - First mission/tape of the game, hang up the phone at least five times during your first call. From then on, always hang up when the psychiatrist calls. - Hotel Mission/tape, let the target commit suicide. Kill the cop on the way out. - Nightclub mission/tape, hang up before going to see the DJ, talk to the DJ, then later tell the psychiatrist that you talked to the DJ. Keep refusing treatment until the psychiatrist gives up on giving you the drug for your next mission. This is the only time when you should not constantly cut the conversation short - all other conversations with the psychiatrist, before and after this seance, keep cutting him short (red dialog prompt). - Prison mission/tape, kill the cops on your way out - Some people say that you shou