Bulletstorm
60 Achievements
1,250
40-50h
Hell Razor
Kill a Burnout using the helicopter that arrives in Crash Site
25
How to unlock the Hell Razor achievement in Bulletstorm - Definitive Guide
Video Walkthrough:
The helicopter is right at the end of the Crash Site Echo. When you finally make it outside you'll be swarmed by a few Burnouts. The helicopter will then come into view but will actually be crash landing to the end zone behind the wall.
When you enter outside, sprint right down to the bottom before the helicopter. When the helicopter catches up it'll be spinning around in a few circles and will pass above your head then it'll finally crash down below over the wall up ahead. So while it does this, this is where you'll want to get the kill. The Burnouts will spawn in front of you and to your left in the corner, so be prepared.
When you reach the bottom before the chopper, wait for a few of the Burnouts to spawn then Thumper them all. At this point while they're in the air and the chopper is spinning out, one or more of them should fall prey to its spinning rotors!
This trophy is an Echoes trophy and can be obtained on the DLC Map "Crash Site". You don't have to play this Echoes mission to 100% by killing everyone. This is a very simple trophy and all you have to do is kill a Burnout using the helicopter that arrives in the Crash Site Map. First thing you have to do is making it past the 2nd Boss in this Echoes DLC. Afterwards enter the room where you'll find the 2nd Dropkit on this map. Use it you refill you ammo and charges because you're going to need the Thumper to get this trophy. Once you leave the room you will see an arrow. When you see this arrow, slide down to the open area as fast as you can and Burnouts will appear. When these Burnouts appear a helicopter will also appear at the same time above you. So perform a Thumper and the Burnouts will fly into the air and get hit by the helicopters blades for your trophy. You shouldn't be able to fail at doing this. Here's a video for a demonstration:
Credit goes to AchievementTips360
Watch the video here