All of them are Beta Keys.
But no keys are deleted or removed from accounts.
Once you add the key to your account, you can play the full version forever.

Please add Ephesus to your Steam Wishlist!

(You need to login to your Steam account to see the store page, thanks!)

Join My Steam Group For Daily Giveaways.

(No Sh*t Game)

If you want more just write comment and joinnnnnnnnnnnnnnnn. <3
Thanks to the developers for the keys. ^_^