In this video I will show you how to defeat an enemy using the environment.
This will be done on level eight, Prison Ship
. Not too long after entering a building from being out in the desert you will see the Scotsman. Continue on and kill the enemies in the next room. After this will be the room where the Lazarus creature is introduced (purple worms). In this room there will also be two giant crates with ropes attached to the bottom of them
. Once the cut scene ends immediately go to the boxes and cut the ropes on the first box and stand near the box to draw the attention of the enemies. Since there is quite a few of the worms that once should get hit and the achievement will pop right away. If not use the other crate and try again.