Item description:

after some additional testing doing the following unlocks these trophies

Prologue

When prompted shoot the guy with the silenced pistol - Unlocks Silent but Deadly Trophy

When prompted to snipe the first guy in the head - Unlocks Front and Center, Go the Distance, World Record, Head Honcho and Iron Lung

When the guy sets off the trip mine - Unlocks Potato Masher

When you return to where you started shoot one of the red canisters - Unlocks Detonator

Snipe a moving (running) target - Unlocks Gung Ho

When completing the prologue on any difficulty - Unlocks Sniper Elite and Can Do

Notes - Already done Jungle Juice and the trophy doesn't pop when completing a level didn't upload it either as there is already a save for it.