"The cake is a lie" writing on a wall - Portal

"Prepare for unforseen consequences", Gman - Half-Life 2

"I didn't ask for this" - Adam Jensen (Deus Ex: Human Revolution)

"It's time to kick ass and chew bubble gum, and I'm all out of gum.” - Duke Nukem 3D

"Kill Frenzy!" - Grand Theft Auto

"Bunnies... Lots of 'em." The main character from Full Throttle

"The cake is a lie" Portal

"The grass is always greener, and you don't really know what it is you have until it's gone." Conker - Conker's Bad Fur Day

Gothic 1

Mercenary: Do You intend to go in there..
Hero: Do You intend to stop me.. !?

"..." - Gordon Freeman

"He who stands with me shall be my brother." and "I fear no evil, for I am fear incarnate!" Gabriel Angelos

Morrowind.

Thanks for sharing!

[...] -SHODAN
(i could not decide for one)

Because you were my everything. If I let you go, I got nothing left. - Isaac Clarke

'I used to be an adventurer like you, but then I took an arrow in the knee.' - Skyrim guards, TES5

"It shone, pale as bone, as I stood there alone, and I thought to myself how the moon...that night cast it's light on my heart's true delight, and the reef where her body was strewn".

Since all the good ones are taken...

"Main engine jetissoned! Switching to crappy emergency power!" - Drakensburg compiter voice, Borderlands: The Pre-Sequel!

Thanks for the great giveaway.

If our lives are already written, it would take a courageous man to change the script. Alan Wake
Would you kindly? Bioshock

Thanks for giving the chance :D