WET

This is pretty easily done in Chapter 5, "Everybody Runs." There is a rage section near the end of the chapter in an area with eight spawn doors. Don't go after the spawn doors and just start killing thugs -- there will be enough spawning that you won't be in any danger of running out. The achievement will pop as soon as your chain kill count reaches 60.

The most Simplest achievement! At the end level " Shock Therapy" when you shooting from machine gun, do not shoot at tank with gas! In a matter of seconds you get 2 achievements - "Turret-Syndrome" and "Graphic Violence"

at the end of chapter 5, "everybody runs" is the easiest opportunity to get this achievement. once you enter into the rage section, go to the left. you should see an area that kind of looks like a stage. there will be 2 doors on the makeshift stage which enemies will spawn out of, along with a few other doors near the "stage". dont destroy any of the spawns.

i found that whipping out the pistols worked the best here. i jumped around to slow time and so i could take 2 enemies out at one time. you can get killed here, but if you jump around quickly , you should be fine. as long as you dont take out any of the spawn doors, you should have no trouble getting a chain of 60 kills. took me about 5 minutes. can be done on any difficulty.