Saw
46 Achievements
1,000
8-10h
Whoops!
First kill with a Stun Mine.
10
How to unlock the Whoops! achievement in Saw - Definitive Guide
You'll find the schematic for the Stun Mine during the game. Once you've created a Stun Mine on one of Jigsaw's workbenches, find a minion, punch him a few times to weaken him, and then select the Stun Mine with R1, hold L2 to enter combat mode and hit R2 to drop the mine. Let the minion walk into the mine, and if he dies, you'll get the trophy, even if you die too.
Schematic Location: This is in a side room just before you find the work table in 3-12.
Secondary Schematic Location: Obi, 5-1: In the same room as the scissors from above.
Melissa, 3-12: The first work table of the game is found inside a small office before the room with all the locked cages and angel statues.
See "Wait for the Boom" for info on successfully killing with a mine.