[PUZZLE] The Video Game Music Quiz 2012. [ENDED]

Real and corrected Description to puzzle:
Welcome to the video game music quiz 2012 dedicated to all the Steamgifts users to solve, all answers will be video games that came out in 2012, you'll find 12 questions, and no worries, a few will be easy as for others it depends, note that all these are games and titles that came out on steam in 2012, also there will be hints, and make sure the name of the game is named on its original title, very well, good luck!

Link.
Took me a few hours to make this puzzle, just in case if you have some questions or feedback, please let me know.

IMPORTANT EDIT: Well fuck, seems like question 3 doesnt work in there, very well here the youtube link for question 3:
Question 3

PUZZLE ENDS IN JANUARY, SATURDAY 19, AND DON'T POST/SHARE ANSWERS.

NEW EDIT: Since many people have been finding problems solving 3 and 11 here are some new extra hints:

3. It is no Episode 3
4. In this game, you have a spunky AI sidekick!