Steam has launched its latest sale this week with Couch Co-op Fest, with a whole catalog between competitive play and co-operative, there's tons to enjoy. Players can find anything from platforming, fighting, casual, and more in this latest sale.
If you play competitively, there's chaotic party games like Party Animals, or the Jackbox Party Pack series. Many fighters such as Mortal Kombat, Tekken, and Brawlhalla (Brawlhalla is completely free) are also featured in this fest for the competitively inclined. Though, for those who play co-operatively, there's cooking calamity in Plate Up! or in Overcooked All You Can Eat!, (which contains all previous content from the Overcooked series), or you can playfully torture your loved ones in the Pico Park series, where just one player dying results in a restart for all on the team.
As usual, trying out some of the available demos might be a good place to start. Plate Up, Castle Crashers, and Moving Out are just some of the massive catalog featured in the fest.