Ok I have finished making my newest map, but I am having trouble playing the sound types under "Game Sounds." I can play the raw sounds with ambient_generic, and the scenes with logic_choreographed_scene, but I cant get the game sounds to play. One of the sounds I want is Portal.escape_00_part1_nag02-1.

This is a known issue. Many of the sounds through the hammer editor are played through scripts and a lot of the music/voice sounds cannot play in the editor.
Miss Stabby found a very good link to the unofficial portal wiki where you can find whole lists of sounds (including captions for voice).

http://theportalwiki.com/wiki/Voice_lines

I understand that lots of sounds cant be played in the editor, but I am not talking about that, I am saying I cant get the sounds out of the sound type "game sounds" to play in game. I don't know what entity I need to get them to play.

An ambient_generic should work for game sounds.

WinstonSmith wrote:
An ambient_generic should work for game sounds.

tested it more, and it still doesn't work. It's frustrating because the sounds from the escape are the perfect sounds I need for my map and the last thing I need to do.
Edit
I am getting tired of all the good sounds I need being the only ones I don't know how to play.