Xbox and Playstation announced their “free” Games for December for if you have a Xbox Live or Playstation Plus subscription.
For Xbox the games are Insane Robots, which you can pick up Dec 1-31st. It sits as an 87 on Metacritic, so even if it doesn’t look like your type of game, it might be worth checking out.
You also get the wonderful Jurassic World: Evolution game, a strategy/city builder game about building a Dino park! Dec 16-Jan 15
For the 360 backwards compatibility you get Toy Story 3, which is surprisingly good for an old licensed game. Dec 1-15
Lastly you can pick up Castlevania: Lords of Shadow Mirror of Fate HD from Dec 16-31.
For Playsation you get the underrated Titanfall 2 made by Respawn, the same people who made Apex Legends and Star Wars: Jedi Fallen Order. This is definitely worth playing for the campaign.
You also get Monster Energy Supercross: The Official Video Game