Anyone know of some fun/free multiplayer games for a Discord group?

It can be a browser game, Steam, other form of download and any genre as long as it's free and multiplayer. Sorry if there's a more appropriate sub for this. Thanks! <:

EDIT: Probably should've clarified I was looking for simpler games like agar.io etc. Something simple that doesn't require being learned and can just be played quick to mess around and have fun