Betrayal.io

Crewmates
Crewmates must complete all tasks without being killed. If you have a hunch who the betrayer is, you can call a meeting and hold a vote to kick them out.

Betrayers
Betrayers can disrupt activities and eliminate crewmates. There are vents that allow betrayers to get around undetected. Kill all crewmates to win the game as a betrayer.

Sign Up
You can play Betrayal.io in online public games, or in private rooms with friends. Signing up for an account gives you the ability to keep your name and progress. There's also extensive character customization with clothes, hairstyles, and pets!