Resistance 3
59 Achievements
20-25h
Sandman
Kill 5 Grims in a row with only headshots
3.8%
How to unlock the Sandman achievement in Resistance 3 - Definitive Guide
i do not take credit for the video
as long as you dont waste a shot you'll get the waste not trophy, if you miss you can throw grenades at your feet to start over.
You can can get to this part rather easily as you can just rush the chapter till you first get the deadeye. In the open window there will be five grims there. Take you take and wait for the head shots other wise you will need restart the chapter again. You can miss the shot after some head shots, It only resets when you hit another body part besides their heads.
Credit for the video goes to sunnygrg from Youtube
This trophy is most readily available in the Trainyard of St. Louis, MO. Once you enter the warehouses, there will be dozens of Grims. To get this trophy, all you need to do is kill 5 grims in a row with only headshots. It is best to use the Marksman for this, because it is accurate, and a single burst to the head will instantly kill a grim.
This needs to be in a row, so if you kill 4 in a row with headshots, then kill one from a shot to the torso, your counter resets. Because of that, it may take a few tries to execute. If you miss it here, you can either come back on another playthrough, or through chapter select. It can also be done with relative ease in Mt. Pleasant, PA, and Graterford, PA, because they also have large quantities of Grims.
For an alternative location, check out this video by sunnygrg: