no sign-up multiplayer games

https://page-wiki.win/index.php/The_Best_Browser_Two-Player_Games_for_Instant_Fun_with_Friends

Looking for a quick game without the hassle of creating an account? No sign-up multiplayer games let you jump straight into the action. You can find everything from fast-paced shooters to casual puzzle battles, all playable instantly in your browser. It’s perfect for a short break or trying something new—no commitment, just fun.