To look like Nathan Drake, you will need the following articles of clothing. The great thing about this costume is that many of these items are fairly generic. Don't have a henley shirt? A regular long sleeve shirt will do. Don't have brown boots? Black ones are fine too!
You will need:
-Long sleeve off-white henley shirt. Example style here
-Cargo pants (can be olive green or even tan). Some suggestions here
-Basic brown belt
-Brown boots. Example style here