TL;DR?! Here's the quiz: http://www.itstoohard.com/puzzle/L1LdJOHG That's all!

Nuclear launch detected! The group is reset and starting a new giveaway. Anyone who complete all missions in this puzzle and comment on the Final Mission private giveaway will be invited to the group and have the chance to win Deus Ex: Human Revolution and other 5 private giveaways, especially the Final Mission one! So it's still worth a try.

Don't try to add me only ask for joining the group, or you will get blocked.

GL HF!

It will last for 1 month

If you have any questions,join the S.gifts or IvR group chat and PM me. This is not necessary, when I tell someone something in PM, I'll add them to this thread as new hints.

Don't share your answers in group chat or anywhere else, I provide this only for you to PM me. Anyone who leak the solution will be excluded from this giveaway! And later Memoir will sneak into their house and slowly torture them to death!

Dead meat: here and there

I went through all missions myself and they works fine.

btw, no more binary things this time :P

Hints:
No needed so far. There're many hincetions out there.

update 1:
M1Q7: Final words, a sentence
M1Q8: Beware of punctuation! I provided many answers for this one, but not the one right after Fenix got killed.
M1Q9: The format will show up soon as a hint. Here's a simplify one: ? mission name in ?
(Try the fixed quiz first, finish it will let you solve Q7~Q9 immediately, and hints still work. Q8 is similar to Q7, FINAL is the keyword. I provided many answers for Q8, the easiest one is just one sentence)

update 2:
Besides Google, here's your another friend.
Starcraft is not a free game, you don't need to buy it. Demo is enough. But demo is a little bit different.

update 3:
Just found some bugs in M1, here's the fix.

update 4:
Added a Tower War Beta Key on the description of Final Mission private giveaway, first puzzle ninja reach there can get this game too!

update 5:
Check update 1 again if you still stuck on M1.

update 6:
Just added a secret mission at the end and one more giveaway, now there're 6 giveaways in total!

update 7:
There're hinceptions hiding in the first limbo. Find them out may help you a lot.

update 8:

If the winner use multiple accounts or enter without sufficient proof I'll ask a reroll and added him to my personal blacklist plus a report ticket to support.

update 9:
Well, M1 was designed as an easy quiz. Format shouldn't be a problem, here's M1 Format.

update 10:
The world built in Limbo is black and white. And you have to fix the level 1 hinception if you find it.

update 11:
Added another steam key on the Final Mission page, ghosts usually don't check the page again after they solved the problem, so you still have a chance. I'm not sure what game it is, it's not from bundles and I'm sure it's unused, comment and tell me what it is after you activated it.

update 12:
Support site test. Don't post any idea on the forum, if you get stuck at some where use Contact support (envelope icon) on the right side instead.

Result

SCV: 1097
Marine: 282
Tank: 91
Valkyrie: 73
Battlecruiser: 58
Ghost: 6

Congrats to the Ghosts who completed all the missions and save the Universe!

I'm busy these days, will post the solution next week, if you can't wait, you can still give it a try.

Solution

Here's the Solution including all steps, ways, hiceptions, easter eggs etc.