Protocol: Doppelgänger

Protocol: Doppelgänger.

They have infiltrated the general population, but mankind has one edge against the body-snatchers. They don't know that we know of them.

At a checkpoint where people usually pass by and their documents are checked, we have a chance to catch them. Ask questions to passerbyers and detain the doppelgängers. It is enough if we catch even one, for then we can know who they really are.

Instructions are available on the starting screen. Gameplay consists of reading dialogue, choosing dialogue options, and ultimately choosing whom to pass and whom to detain.