CONTAINS SPOILERS
Chapter 6 "Graduate" Trial Phase
You'll be in an area with all of the characters, dead or alive. You'll have only one bullet named "null." For the first argument, don't click anything. After that, let the conversation move along. Wait until Chiaki says "part of the game." Memorize that statement. For the final argument, wait until Chiaki says "eternal game utopia," then shoot it with the memorized bullet.
