A few days before the official release date of Half-Life 2: Episode One, Valve let the people who had pre-ordered a digital copy of the game to preload it to prevent the Steam servers from collapsing during the actual release. The files were encrypted, but a few of the modders did manage to dig up some info about the then-upcoming game.
Many of those files were later removed from the game with the updates, but recently fans from the VCC Discord group managed to get a few cut G-man voice lines. It seems these dialogue files were to be used during the introductory sequence.
Here is a transcripted list:
gman_05.wav - So nice to have you with us, Mr. Freeman!
gman_12b.wav - Get back where you belong and forget about all this...
gman_12c.wav - We meet...
gman_12d.wav - Again...
gman_12d02.wav - Again... (alternate pronunciation)
gman_comebacknow.wav - Oh no, Freeman... come back, come back here now.
gman_getbackhere.wav - Get back here...
gman_inhale.wav - (inhale sound)
gman_laugh01.wav - (laughter sound)
gman_notforlong.wav - Not for long...
gman_notthistime.wav - Not this time.
gman_snarl01.wav - (snarl sound)
gman_wellseeaboutthat.wav - We'll see about that.
gman_wellsh.wav - Well... well, shit.
You can download the preload files
from our site.