Not A Game (SkyDoesMinecraft)

Adam is playing a regular game of Gmod murder with Red, Barney, and Ross until the power in the office goes out. He stands up, and all the sudden one of the lights in his office sparks.

This happens to the others, and they all get sucked into Gmod. None of them are the murderer, and none of them are the sheriff.

Soon they find out the hard way that there is a murderer and a sheriff, and they have to stop the murderer to return to their own world, before it's too late.