Zkuq on 29 May 2010
"Metal Gear!?" - Just about any Metal Gear game with a Metal Gear in it.
"Guten Tag!" - Wolfenstein 3D
"It's time to kick ass and chew bubble gum, and I'm all out of gum." - Duke Nukem 3D
"SSS!" - Enemy Territory: Quake Wars
"Look, no hands!" - Command & Conquer: Red Alert 2 - Yuri's Revenge
Dragon Age: Origins has tons of hilarious dialog as well.
