"Uncharted: Drake's Fortune" has now been patched to add support for Achiev...sorry...Trophies
The Trophies will use the game's existing "Medal / Treasure Point" system.
They're not rewarded retroactively, so if you have already played it, & now want some Trophies, you'll have to start again from a new save.
I've been thinking of re-playing this for a while...