Hey! so. to unlock Cheater Mode. you will 1st have to get a Orange Soda (by getting a coin and entering into the soda machine. or finding at a random place in the school) and Glue. avoid going into any of the Class room. which, if you do. Dave will rush towards you. Once you have those. go back to the start. and in front of Dave. then, Shoot the soda. and once Dave was outside the school. glue the door. and enter a class room. and Boom! you unlocked Cheater mode