IRL Cakeday was coming!

So, there is a train of game giveaways - nothing special, but I'd consider these games worth having in my library.
Level restriction is 1+

Every giveaway is acessible through a simple puzzle.
I tried making puzzles simple, but not trivial.
Every puzzle is related to the game it leads to.
If there will be people stuck at some puzzle I'd provide more hints or a shortcut to the next car, so that the next puzzle can be attempted.
Ranting, pleading for hints and other feedback is highly welcome

Update 1.99

It looks like almost everyone is stuck on the second puzzle, therefore I'll provide a couple of hints for that one today. The first one will be just a small one, but the second is going to be more precise. Also a shortcut to the third puzzle will be given in the second giveaway at the time second hint is provided (the puzzle difficulty is sort of random, so the 3rd might be easier, than the 2nd... may be not...).

Hint 1 (puzzle 2)

The giveaway behind the puzzle is actually not for a single game, but for a 2-game set.

Hint 2 (puzzle 2)

Of the three actions the puzzle want you to perform on a particular input one is purely arithmetical, the other two are rather string/array manipulations althought one of them can also be described as a set of mathematical operations of the input is slightly pre-processed.
(Also giveaway 2 now has a shortcut to puzzle 3.)

Hint 3 (puzzles 2, 3, 5)

There are not only the hints I've left, there also hints I didn't care to hide.

Update 2.3

Seems like it's time to add more hints. Expect them to be coming soon. Already updated hint 3.
Have you been attentive to accompanying information and looked for hints to puzzles 3 and 4 that were initially there?
List of puzzle titles and corresponding numbers now available.
And there is a first person to reach the last puzzle.

Hint 4 (puzzle 5)

Q1 and Q2 represent the same type of in-game lore, Q3 - another one and Q4 - another one. First 3 questions can be found on the wikipedia entry for the game. Q4 has a separate wikipedia page, which mentions the game (as the term used there is very specific for this particular game).

Hint 5 (puzzle 5, Q4, vague hint)

Batman!

Update 3.0

Time for more hints, I guess. This time I'll summarize thing that were given as comments in this thread, as some of the comments had mistakes in them and were accidentally misleading.
Plus added some more hints (may me obvious).

Hint 6 (all puzzles)

Only the last puzzle has a game name (non-bundle stuff) as an answer. Others can use parts of the game names or don't use game names at all.

Hint 7 (puzzle 4)

Questions in puzzle 4 have numerous possible answers. Taking the symmetry into account leads to a pretty simple bruteforcing procedure if you don't know what the puzzle is actually about.

Hint 8 (puzzle 3)

No dots necessary (although acceptable).

Update 4.0

There is less than 24 hours left before the giveaways end. A shortcut to the fifth puzzle is now open at the second giveaway.

Update 5.5

Last minute feedback leads to last minute hints.
And there is a first person to solve all of them!
As it was pointed out images search on puzzle 3 provides no meaningful results under some conditions (checked that myself from a different location), therefore, a hint/lead is provided.

Hint 9 (puzzle 5)

Q1 and Q2 can be summarized as a mathematical concept. Although you don't need to put this anywhere in the answers.

Hint 10 (puzzle 3)

"Black mixture of hydrocarbons and free carbon", "cave" (synonym, sounds similar, but not exactly), thing above you (when you are outside).

Hint 11 (puzzle 5)

1.7

Final Update

Thanks to everyone participating in the puzzle train. The giveaways have ended, the keys have been sent.
One game is left unclaimed and it goes public.
See below for puzzle answers and hints explanation.

Puzzle list

1. Crossing the river of eternal void
2. The order, the moment
3. What's that thing glowing?
4. It is alive!
5. Obliterate!
6. What's there in the distance?

Answers

Puzzle 1
Puzzle 2
Puzzle 3
Puzzle 4
Puzzle 5
Puzzle 6

Solutions

1. The questions are the "Game Over" messages in "The Bridge". Googling for the first one usually results in nothing particular. Googling the second one or several of them is likely to get you here, where you can find all of them.

2. Please share how you got stuck with this one, so future puzzles can be improved. The way to solve the puzzle is to take the numbers in my nickname ("your host" was myself), split them in two parts (13 and 9), swap the order ("left to righ and right to left", thus 9 and 13) and do what the questions tell you to do (subtract 2 from each number). This gives you the numbers in the game names in the bundle 7 and 11.

3. Google search for the image usually (but not always) provides a short video about Andrei Tarkovsky. Stalker is one of his most famous movies. Additionally hint 10 says "Tar"-"cove"-"sky" and the imgur image description mentions three characters from the movie (the writer, the professor and monkey).

4. The figures are dynamic figures of the Game of life. Adding one additional cell (depending on position) either makes the configuration evolve into a static figure (Q1) or four figures identical to the initial one (Q2). Imgur desctiption has additional lead to the Gmae of life.

5. The answers are Total Annihilation (first game of the series, that led to Planetary Annihilation, AFAIK) in-game lore. Q1 and Q2 are the two in-game fractions. Q3 is the field leader of the troops, the Commander. Q4 is Nanolathe, the cool way of construction used in the game. Last-minute hint "1.7" is the in-game time of Planetary Annihilation in my Steam profile (didn't have mech time to come up with something more relevant).

6. The puzzle just point to the wikipedia description of the parallax effect. (googling alteration effect movement distance usually gets you tere in no time).

Also, note, that titles and descriptions in the puzzle are always highly related to the game and thus the answer.

No action here anymore!!!

Mood music

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