Ok lads, another puzzle giveaway. steamgifts.com/xxxxX. X is a capital, the rest are numbers or lower case letters. The game is alluded to in the fifth question. I will say it's a 20P game. Opens in two hours, open for one week.

Out for a walk one day, you stumble across an old pigment factory. The sign on the door reads:

1) Danger. Do not enter. Hazardous material .90.122.40 detected. Use 146 mask. (Hint: I've done this before)

Disregarding all warnings, you enter. You see a note on the table with a curious question:

2) Where are you? (Hint: If you're following the theme, you're in a certain place. Otherwise, you're in a certain thread)

3) Puzzled, you hear a noise. An old man approaches from one of the warehouses. He signals that he means you no harm. He tells you about a secret message hidden amongst other messages, relayed to him by a charitable visitor who gave him this cryptic clue as to where it is hidden. "Look for a large man in a yellow jumper who had an obsession with a gravity gun."
(Hint: Rochard)

4) He then points to a sign and tells you that every third word is key. The sign says: (Hint: How many keys?)

"Return personal key and production key to the key holder at key notice periods. Key releases the key bonding agents key to production."

As soon as he appeared, he is gone with a faint whisper echoing around the building.

5) "This is a dangerous place. If this were working, you would be best to use it. You better get used to them. You'll see them a lot where you're going to end up." http://i.imgur.com/mC1wQ.jpg

(Hint: This picture is of a certain device from the pigment factory. There are, in fact, hazardous materials. If it were working, and you worked there, you might want to use one of these)