We are not alone... [ended]

Update:
There have been several added hints (both here & on ITH) since I started the puzzle, and a few more acceptable answers as well.
If you haven't managed to solve this earlier, you might want to try again.

Without further ado, as most of you know the drill:

Get crackin' people: puzzle
It's much simpler than you think, especially with the hints.
Q8 is not part of the game series from Q3 & Q4
tick, tock

These were later added to the answer of Q8.

Solution:
Here's the long answers version (there's a short one in the end):

1
The meme image is from a History Channel show.
A: Aliens

2
Meme + Aliens + Google!
A: Giorgio A. Tsoukalos

3
1st: Halo (is a hint), 2nd: row, combined: Saints Row
A: GAT

4
.....really?
random
A: Alien Probe

5
??? = 3 times ? = 3 characters
This sentence usually involves something airborne in it's end - what is "alien" and "airborne"?
A: UFO

6
In MMOs, <farm>ers are ruining the economy.
TTD = Transport Tycoon Deluxe (wasn't meant to be part of the puzzle, I just instinctively shortened it...)
<a video effect called "film ____"> = "film grain" = grain
(<portal song>+<some things from the next question>) = <still alive><animal meat> = livestock
A: Farm

7
Usually used for a group of birds.
(Topic) Focker/Fockers & Flocker/Flock (and their innuendos) sounds like the answer (you hear me!).
I must admit this one is rather tricky. The game's name references the animals in it as a flock (but cattle & pigs have different words for that. The later added rabbits... have even more words for that.)
English is a crazy language when it comes to groups of animals.
Flock - birds (chickens)
Flock - sheep (search that page for sheep)
Groups of animals - names
A: Flock

8
The punctuation is 6 exclamation marks, the last one is styled - the answer is 5 letters plus a final exclamation mark.
Like Q7 (you hear me!)
100% of "Flock" = 83% of "Flock!" (5/5=5/6 characters)
A: Flock!
A: Flock!
A: Flock!

The tl;dr version: All possible answers