After looking up the games on steamdb and looking at the packages, all these games have RU+CIS and Asia restricted regions. I'd guess it's one of those regions that can activate these games. A few of them also had Latin America but not all of them. Which is why I'm thinking they are Ru+CIS/Asia game keys. Could be completely off on that though, will be interesting to see if someone from those regions could try and redeem them.

Weird. Not available in the US either. Good luck to anyone else

Woohoo! Thanks!

Thanks! Same problem for me!

i got one, thank you, will try later when i got home. The other code, some already redeemed or not for my region. Thanks OP..

Everything is redeemed

What country?