Hello!
A paid add-on, for a game called Antstream Arcade, is free for a short time.
As long as you claim your free add-on before the 2nd December.
Antstream Arcade is a free-to-play game that is packed with about 1,000 free classic arcade games. Link to download it is further down this post.
Game Description:
Unlimited Retro Games all in one place! With over 1000 titles available, Antstream Arcade is the Biggest Retro Gaming cloud platform. A unique modern experience to retro games with many integrated features such as Challenges, Multiplayer and Tournaments.