You wanted Aeria A.V.A on Steam right?(there actually is sticky thread) So you did teh steps and you can't see A.V.A. in Steam library? that's because on Steam A.V.A is available on some regions
but i'm from Georgia (Country) and i can still play A.V.A by helping Hotspot Shield!
Hotspot shield is awesome program that helps you to be undetected in web and games, (Doesn't work on MPGH )
You are Secure and Anonymous behind the Hotspot Shield
Your IP address is your digital fingerprint that you leave behind on every website you visit making you vulnerable to online threats. Hackers everywhere use your IP address to access your computer and steal your passwords and important files. Hotspot Shield secures you by replacing your IP address with its own US IP address. Once you are behind Hotspot Shield, you become anonymous to the outside world.
So now... Instructions
1st : download hotspot shield ( extract from archive)
2nd : Install and run it
3rd : Press Connect & Wait about min
4th : A.V.A will appear in steam library
5th : press play & have fun!