Puzzle with SS The Second Encounter HD inside

As promised last week in my public giveaway, I'm making a puzzle giveaway for SS The Second Encounter HD. Thanks to user Usagi I found out itstoohard.com and made a few questions regarding FPS games in recent history, I believe you should be able to solve it without problem. If there are any doubts, every game on the list was released for PC so don't try to answer with Killzone or something.. If you can't solve some questions please write here and I'll give you hints but please don't post answers here (or anywhere else :))

Oh...the puzzle will run till friday so you have plenty of time :)
have fun!

http://itstoohard.com/puzzle/zI0GbyKh

edit:
2: go with the most "obvious" one, as MorphineBear pointed out there are more "correct" answers, if in doubt use the single player one
6: the question is not about the protagonist IN the game but about the archenemy of the game, something like...BF vs COD franchise
I see many people having problems with number 6...I should write down Quake 3, it would be fairer
There are 41 entries as of Sunday 9:30 CET so I guess it's solvable ;)