Call of Duty: Modern Warfare Remastered

At the beginning of the mission head inside the closest building (a church), make your way to the back, turn left, following the stairs and then climb the nearby ladder. At the top are a handful of RPG launchers. A scripting sequence will occur to trigger a battle where you hold off enemy waves. Use the RPGs until you run out of ammo.

This is completed in the fifteenth mission "Heat". At the beginning of the mission, you will be defending a position at a church. Head up the tower in the church and you will find a cache of RPGs. Now just use them all up, you do not need to kill anyone with the shots, just take the shots. This video was recorded on recruit difficulty, as the difficulty level does not affect the achievement / trophy.

Here is a video guide with English commentary for this trophy!


Here is a playlist of guides for this game!

https://www.youtube.com/playlist?list=PL-HeW6XkKdUJ3mDD5Tj6n...

Mission: Heat

At the very beginning of the mission, you'll notice a church in front of you. You'll be asked to hold your position alongside a hillside, but instead, we want to go upstairs in the building to find the hidden cache of RPGs. As soon as you spend all of your ammo, this will unlock.
Soon after, you'll have the opportunities to unlock:

On the level (Heat) there is a building you can just go inside to and pick up some weapons to get a trophy, it may take a while for the trophy to pop once you get into the location in the video.