It's the impostor game mode of Survive the hill.
As you complete your missions as a team with your friends, an evil spirit will enter one of your friends and turn him into a rogue killer, but you will not notice this situation.
Your impostor murderer friend will act like you and look friendly, pay attention to your surroundings and your friends, you can face death at any moment.
Uncover the impostor killer, follow in his tracks and help each other in the Conversation arena.