Pass "meet Your Brother" Mission:

Ok, right, so, for this, it's better that you has enabled the cheat. Star the level and press the key "°" and write this cheat code: giveall. That cheat code will give you all of the weapons with max ammo. Kill the guard that is in the first door when you begin the level and proceed to scan your barcode. Then go to the door that is in the right side from you. Proceed to the end of the hall and kill the guard that is there. Then, there will go so many clones of you. Kill them. When none are coming anymore, pull a body to the barcode scanner, and there will be an opened door. A man will appear. He is the creator of Tobias. Oh yeah, the name of 47 is Toboas Rieper. Kill the creator of Tobias and you should finish the level and game. To skip the credits just press "esc".