If Gordon Freeman could say one sentence, what would it be?

[Sixties Spidey]

"Where the FUCK is Episode 3?!"

Then Valve would have to make it. XD

 

[Jamous]

"Why Me?"

 

[A big red rooster]

ALIENS AND MONSTERS ARE ATTACKING MY PLACE!

 

[RheynbowDash]

"Go make me a sandwich."

 

[laststandman]

"I'm here to kick ass and mess with gravity, and I'm all out of ass"

 

[aarontg]

"This suit itches"

 

[IrrelevantTangent]

"You have no power over me." Directed towards the G-Man after winning a final confrontation with him.

 

[titankore]

"Ahhhhhh that was a great nap..." looks around " What the hell happened"

And that's why he's a silent protaganist he was sleepwalking through the whole game.

 

[RTR]

SHUT THE HELL UP, ALYX!!!

 

[BloodyThoughts]

"GOD DAMN ALYX STOP FUCKING TALKING I KNOW WHERE TO GO!"

 

[SUPA FRANKY]

" You nerds happy,now?"

 

[agerdemon]

He's so cool he would choose not to say anything even if he could

 

[Chris^^]

i actually took my degree in applied needlework, i hate science..

 

[Master_of_Oldskool]

"Humanity won, you lost, bitches." Or, if it turns out he doesn't manage to defeat the Combine in the end:
"See you in hell."

 

[Gauntes]

"Yes, excuse you"

 

[thejdcole]

Ok i read through it, these are my top 5;

"I'm here to kick ass and mess with gravity, and I'm all out of ass"
"Now, about that beer you owed me..."
"I should have took that job with Aperture Science..."
"I love you, Alyx," followed by "You talk to much Gordon,"
"I'VE HAD IT WITH THESE MOTHERFUCKING COMBINE ON THIS MOTHERFUCKING PLANET!"

 

[Ironic Pirate]

"Damn it! I locked my keys in car again. Fuck! Now I have to take the train. The stop is either Black Mesa or Mack blesa... oh, I'll never find this fucking wedding..."

Cue start of Half life one.

 

[D0WNT0WN]

No, you do it.

 

[Palindromemordnilap_v1legacy]

Given the life he leads, probably something like "AAAAAAAAAAAAAAAARRRRRRRRRRRGH-ARGH-ARGH-AAAAAAARRRRRGGGGGGHHHH!"