Betrayal.io is an online 3D game. Betrayal.io is a free stealth arcade game that is made from 3D cartoon game art animation. You are allowed to customize yourself with different outfits you like. You are able to act as the crewmates or imposters. As a PVP multiplayer IO game, it is time for you to show your game talents! How To Play Betrayal.io: Click and tap to play.