Tom Clancy's Splinter Cell: Chaos Theory HD
37 Achievements
15-20h
PS3
Life's Edge
Neutralize 20 enemies with the combat knife
20.9%
How to unlock the Life's Edge achievement in Tom Clancy's Splinter Cell: Chaos Theory HD - Definitive Guide
Malak101
Go up to a enemy and use 
to kill them with your knife. Playing through half of mission 1: Lighthouse and knifing everyone should unlock the trophy.
Aeon_Evil
stratege.ru
stratege.ru
This guide was translated automatically. Show original
Just kill 20 enemies. In the back or in the throat - it doesn’t matter. Grips are not suitable for this; usually Sam just gives a tasty kick to the spine. Killed but not saved enemies (loading a save before killing) do not count. The easiest thing to do is at the beginning: there are 18 enemies at the lighthouse - if you are not afraid of ruining the rating, you can simply cut out the entire map. You finish off two more (three, five) on the ship. Having received the trophy, you can simply boot up and proceed “cleanly”.