Indiegala Gift!
This is an Indiegala Gift that will be sent to the Email linked to SteamGifts. You will probably require an Indiegala account to redeem the gift and it will likely have to be linked to the same email address to work. If you get a 404 error when redeeming, I suggest you log out, clear cookies and log back in again and retry. If that doesn't work you may need to make a new account with the email that the gift was sent to.