2 free to play games for the weekend are now live on Steam. The full games are also on sale. Games include;
Second Extinction - ends on 3rd October
Blaston - ends on 4th October
Haven't personally played either, though both do look interesting.
Second Extinction
In Second Extinction you take on hordes of mutated dinosaurs with up to two friends. Solo players beware: Second Extinction is designed with squads in mind. Only the strong will survive.Blaston (Requires VR Headset)
Saddle up, partner, because this Blaston update is unlike any of the others — the brand new western-themed “Quick Draw” update allows Blaston players to duel wild-west style! Duck, dodge & weave like Neo as you duel players & bots to rise to the top League with your loadout assembled from collected weapons in this competitive slow-motion bullet-hell of endless skill & depth from Resolution Games.
Second Extinction has a new update which either went live yesterday or should be today.
You can crossplay between PC (Steam, Epic Games Store, Microsoft Store) and Xbox (XB1/XBS X|S) so if you have friends playing elsewhere, the latest update will allow you to party up together.
https://www.youtube.com/watch?v=t2UutpqEXsI
I haven't played the game since it launched on Xbox Game Pass so I can't comment on what it's like now, but for about 35 hours back in May, two friends and I had a lot of fun with the game.