Hitman: Blood Money

To get this achievement, you'll need to raise your Notoriety to 100. This can be be spread across multiple missions.

Complete missions, but be sloppy. That is, leave lots of witnesses, get caught on tape, and make a lot of noise.

Keep in mind that you'll probably need to start a new career for this one, as any missions you complete retain your best notoriety on subsequent playthroughs.

Also, don't try this on the Rookie, as Notoriety is not taken into account.

I had fun doing this one last, right after finishing the story on Professional. It was fun to just run around guns blazing like an idiot after spending all that time being stealthy.

To get this achievement I played on Normal Difficulty. You only need to play ' A Vintage Year ' and 'Curtains Down'. I recommend buying pain killers as this will help a lot . When you start a vintage year run forwards , through the double doors . Your first target will be walking into the wine cellar . Drop a coin behind him . This will make him follow you . There is a cameraman filming a house to the right next to a chair . Get your weapon out and shoot your target on camera . Don’t kill any guards and run to the left . The mansion should be there . Climb up the pipe and into the first window. Shoot the first target and jump out the window you came through . Use pain killers if necessary. Then escape the mission . Your notoriety should be around 62 / 100 .

For Curtains Down run down the stairs and through the double doors . You should be in the theatre near the seats the audience would sit in . Wait for the target to come on stage and shoot him . Run out the doors you came from and your other target should be on his knees or running near the entrance . Do Not kill anyone else but the targets to get more notoriety. Then escape the mission your notoriety should be 100/100. If it isn’t just play the next few missions a little bit sloppy ( be caught on camera leave witnesses alive etc.) and the achievement should pop. I hope this helped

Notoriety is something that is shown at the end of a mission, if you hit the ground and killed many people like a maniac, you will increase your notoriety quickly, now if you are someone who sneaked like a real Silent Assassin, you do not increase anything.
This achievement consists of increasing your notoriety to 100, which is the maximum, for that I recommend to play in Easy mode, because there the enemies will have more difficulty in killing you and will be faster to finish, I recommend you to use big weapons, like Assault Rifles and Sniper.