A bunch of stuff from TF2:
"What was that, sandwich? Kill them all? GOOD IDEA!"
-Heavy
"Well, off to visit your mother!"
-Spy
"I told you to not touch that darn thing."
-Engineer
Half-Life 2 had some good one-liners too:
"Sometimes I dream about cheese."
-Resistance member
"I don't even remember when I had a shower last time."
-Resistance member
"Sheckley."
"What?"
"SHECKLEY!"
"WHAT?!"
"...Forget it."
-Sheckley and Griggs
"What was that, sandwich? Kill them all? GOOD IDEA!"
-Heavy
"Well, off to visit your mother!"
-Spy
"I told you to not touch that darn thing."
-Engineer
Half-Life 2 had some good one-liners too:
"Sometimes I dream about cheese."
-Resistance member
"I don't even remember when I had a shower last time."
-Resistance member
"Sheckley."
"What?"
"SHECKLEY!"
"WHAT?!"
"...Forget it."
-Sheckley and Griggs