This is a Cleo mod made by me, if you go to verdant bluffs (the top, near the White house) between 23:00 and 4:00 you will make Jason appear, when this happens you will not able to do any mission before you finish this one, 5 ballas will appear and kill you, they use uzi, sawn-off shotgun, ak47, a silenced and a bat, they have more than normal life, they can't be killed by headshots, after you kill them, jason will apear with a katana, he has a LOT of life, but if you use a powerful weapon you will kill him in not much time, when you defeat him, you will receive $80000, respect and you can play missions again, also i included a video of gameplay. Another cleo included to spawn weapons and some vehicles in Groove Street to kill him. Gxt entries are in english and spanish, so you can choose one of them. Enjoy!