This is a slight variation of the better-known Movie Quote meme.
1) Pick 15 of your favourite video games
2) Choose a quote (or several, if you really don't have 15 favourites) from each
3) Post them in your journal and let people guess
4) Also, don't cheat! Just googling the answer isn't the same as actually knowing it.
5) Tag some people. (Nope)

1. Don't let that horrible-person thing discourage you. It's just a data point. If it makes you feel any better, science has now validated your birth mother's decision to abandon you on a doorstep.

2. Take a good look, everyone! Unable to find a rival worthy of my genius, I was forced to create one by myself! Here I am! The tragic clown...

3. Move along or I may spill something on your face. Want a dose of experimental Hydroxyacelunodosetrase?

4. You euthanized your faithful Companion Cube more quickly than any test subject on record. Congratulations.

5. Even if I lose, is it different than the future I envision?

6. A lawyer is someone who smiles no matter how bad it gets.

7. Dream your dream! Then, pursue the ideals to make that dream a reality, and someday you will achieve all that you dreamed of! Well then… Farewell!

8. Because I'm still holding all the cards, and guess what: they're all full houses!

9. One day, you will awaken to a world of my creation. A world without spirit.

10.  Did you know you can donate one or all of your vital organs to the Aperture Science Self-Esteem Fund for Girls? It's true.

11. THIS! SENTENCE! IS! FALSE!

12. Here, teacher I am. Good it is you study here!

13. What if I get a bite while I'm in the bathroom?

14.  Big Brother got lost, so Jovi brought him back!

15. Hey buddy! I'm speakin' in an accent that is beyond her range of hearing!