That's Not My Neighbor starts with a simple task: check the people arriving at an apartment building and decide who should be allowed inside. The problem is that some visitors may not be who they claim to be. Doppelgängers can look convincing, so letting someone through without checking the details can quickly turn a normal workday into a dangerous situation.

The basic process is easy to understand. A visitor provides identification and other information, while the player checks it against the available records. Names, apartment numbers, photographs, and small differences in appearance can all become useful clues. The challenge comes from knowing which details deserve a closer look before making a decision.

The game also creates variety through the different people who appear at the entrance. Some visitors seem completely ordinary, while others may have something unusual about them. As more cases arrive, remembering what is normal becomes just as important as spotting what looks suspicious.

Another interesting part is the pressure behind each decision. There is no need for complicated controls, but careless choices can have consequences. Taking a few extra seconds to compare information may be enough to catch a Doppelgänger before allowing them into the building.

That balance gives the game its appeal. That's Not My Neighbor is easy to pick up, yet identifying every suspicious visitor requires patience, concentration, and a good eye for small details. Each new arrival brings another chance to prove whether you can tell a real neighbor from an impostor.