Well, I assume you know about Steam's trade system do you ? It is used to trade cards/items.

What we (I) did was to trade a game code via chat which while not illegal, officially its not something they like very much anyway. So it's not their fault, but mine.

Also, what a poor soul. He feel like he got scammed: http://steamcommunity.com/id/Arkhanda/recommended/275850/

Love the response :D

Neat!

What a ****!
Without knowing the facts, however, it seems like you also feel "scammed" by the game, from that reply.

Update time:
On my profile he posted: "bro , i haven't used it i went to his house , but he had windows update , so i don't want to do this trade anymore" (claimed its for his friend at first)

Chat:

Gonen32: ?
Gonen32: https://steamrep.com/search?q=http%3A%2F%2Fsteamcommunity.com%2Fid%2FArkhanda%2F
Gonen32: motherfucker, you will pay for this.
Gonen32: dont you lie to me. we had a deal.
Gonen32: no excuses please.
Filthy Casual: check
Filthy Casual: the key
Filthy Casual: i still havent used it
Gonen32: if I'll check it it would be used. You are known as a scammer on SteamRep. admit it and thats it.
Gonen32: so ?
Filthy Casual: so what?
Gonen32: so do your part of the trade. And don't tell me stories.
Gonen32: anything to say ?
Gonen32: Very well. The whole chatlog is documanted. Is it obvious that you scammed me. You have one hour do your part, or I will file a complaint to steamrep and make the hole you stand in even deeper.
Gonen32: are you listening to what I'm saying ?
Filthy Casual: dude , i havent used the key , i don't even know it now since chatlogs deleted , im not going to pay for what i did not got and i can prove that i did not used so sure report me
Gonen32: Don't you bullshit me.
Gonen32: there is a reson you are banned on steamrep
Gonen32: multiple, actually
Gonen32: so do your part, or another one will be added.
Filthy Casual: alright i won't just respond at all dude , sure i can prove that i did not used it so do it
Filthy Casual: just do it
Gonen32: how can you prove it ? come on. prove it.
Filthy Casual: i will prove it if you report me , it just too much efford for nothing
Gonen32: oh yeah, effort ? please tell me how to check if keys are used, and I will do it for you.
Filthy Casual: the site is in russian
Filthy Casual: you wouldnt even understand
Gonen32: try me
Gonen32: there is no way to check keys other then activating them. I'm not an idiot.
Filthy Casual: you are and you can
Gonen32: so, show me how.
Gonen32: what's the problem ?
Filthy Casual: too much efford
Filthy Casual is now Busy.
Gonen32: the effort is worth it. unless a report worths more.
Filthy Casual: nope
Filthy Casual: efford is not worth it
Gonen32: you still have 45 minutes to change your mind. think about it.
Filthy Casual: no thanks
Filthy Casual: just google it
Filthy Casual: you should find it
Gonen32: listen, I have the advantage here, so I am the one that makes demends. You will tell me how to check it. Now.
Filthy Casual: GOOGLE IT|
Gonen32: I did, and it sayed that you talk shit. Now. Any other excuese ?
Filthy Casual: 09 tread?
Gonen32: what ?
Gonen32: what are you talking about ?
Gonen32: who is that friend of yours by the way ?
Gonen32: let me see his account.
Filthy Casual: Top Shelf
Gonen32: I will keep an eye on him. and on you. The moment he logs in, I want to see Chivalry in his account. And then, you will gift me HLD, as we agreed.
Filthy Casual: scroll at top of the chat
Filthy Casual: i did not use it
Filthy Casual: he did not use it
Filthy Casual: i don't want to trade with you since its pain in an ass
Gonen32: I don't want to file a complain (as a start) but I will unless you would stop acting like a dumbass and think that I'm even a bigger one.

What should I do next ? How can I pressure him ?

You trusted someone named "Filthy Casual"? :P

:P !!!!
I nearly fall off the chair! ;)

Realistically speaking, you can't. There's no real mechanism for enforcing accountability with trades. The closest thing to doing it would be a trusted escrow system for games like the community-run effort that was attempted (and failed) here.

You can say whatever you want, but aside from filing those complaints, the best thing to do would be to eliminate people like that from your life entirely, think of it as a lesson learned, and refrain from trading with randoms. Or even better still, don't trade at all.

Yeah,stop star gazing.

test post

Would anyone want to check if the Chivalry key is actually used or not ? I don't care about it.

Hire an ace hacker like the Seth Green character in The Italian Job to destroy their lives.

OK, I've got a solution for you, but you probably won't like it. Check it out:

In 1972 a crack commando unit was sent to prison by a military court for a crime they didn't commit. These men promptly escaped from a maximum security stockade to the Los Angeles underground. Today, still wanted by the government, they survive as soldiers of fortune. If you have a problem, if no one else can help, and if you can find them, maybe you can hire the A-Team.

PS - I love it when a plan comes together.

No, judging from the shady character even if it was an active key it could have been bought with a stolen credit card or something.
LOL, love it. :)

It's his key, he gave it to the 'hacker', they said they haven't used it.

Oh, I misunderstood that part. In that case, I could test it (or anyone), however testing a key redeems it if you do not already own the game and it is a valid key. I don't think there is a way to test a Steam key without it becoming permanently bound to the account in question, unless the person already owns the exact game in which case it will give an error.

Re-reading things again I'm not sure why I got that mixed up. :) Could be it's way past my bed time... :)