Hitman: Absolution is the current giveaway at GameSessions. The game must be activated before before 13/02/2019 (10AM UTC).
If you don’t know what GameSessions is, read this.
I don’t know what to do with this GOG gift code for Fantasy General. So here is the link for anyone to claim the code.
In the words from GOG, “Redeem this code to add Fantasy General to your library. Act fast, it will expire on 17 January, 2019 at 23:59:59 UTC. “
While I am at it, here are two other gift codes that no one seems to want.