Finally! Been waiting for hours to vote [OWN] on this one. ;)

To be fair, going by the name, that's kind of the point of this bundle.

tried OMEN, OMENVIP, VIPOMEN and then,
with hardly any confidence that this could be
a code, "OMEN July" and it actually worked.

so thank you!
(OMENJULY also works)

Shows for me in the US.

Germany it's available.

If you have none of them, I'd say its a pretty good deal.
...if they are in your categories of interest.

Since Quantic Dream released Heavy Rain and Beyond: Two Souls on PC, I really started to regret watching whole playthrough of these games back in the day on YT, only because they were PS3 exclusives. Well, with Beyond: Two Souls it isn't that much of a problem because I forgot many things from this and plot goes through many timelines, but with Heavy Rain the problem is that when you know the main plot axis (which is the killer identity - and sadly I remember who it is :/) then it destroys the whole fun from playing. Anyway I think I will play those 2 one day just to relive the gameplay on PC. Luckily I haven't watched any series from Detroit: Become Human... But this adventure still awaits for me.

Yes, it's one key

If you already own the game you can try to activate it here.
When you paste the key, press F12 before you try to activate it.
Navigate to the network tab on the window on the right that just opened.
Then you can try to activate the key and the steam will tell you that you already own the product, but on the right in the network tab you will see a line pop up called ''ajaxregisterkey''.
Click on it and small code snippet will show up.

There you will see a line called packageID = "some number", just above item descriptions which says what is the name of the game that that key belongs to.
Copy that number and go to steamDB.
Search the game that you want to check there and when you do, you will see on the left multiple options to click, click on the packages.

You can usually ignore bundles and go straight to the Store Packages or Packages.
There you can compare the packageID that you got when you tried to activate the game and find the one that matches.

Click on it and navigate to the Metadata tab, again on the left side of the page.
There you can finally see if the game has any region restrictions or not.
There are some steamDB addons that you can use that do all of this for you, but I never used them.
If the game you want to giveaway is not in your library, then you can just navigate to the SteamDB page of the game and find any packages that might be connected to your region.
For me, I would look for packages that have Serbia in it, but some other region restricted countries and exclude them all just to be sure.

Sometimes you will see packages that say that the game can only be activated in your country + some others, or that the game doesn't activate in China or Russia for example.
If the game has multiple packages that fit that description, safe bet is to remove all countries from those as well, as you can't be sure which one of them is the one that you will get.

Not sure if contacting the store could help and if they even respond to such questions.

One small thing to add, if the game has multiple versions it can sometimes activate for you even if you own it. So be carefull.

And another, in rare cases devs release a new package with new restrictions that is not yet updated on SteamDB. In that case it is what it is and asking support for deletions should be fine.