The Neighbor's house was blue, and while pretty large on the outside, it only contained one floor, with the stairs to the next floor blocked by a pile of furniture. In it, the player was required to get a crowbar or a hammer, a key or a lockpick, and a four-digit code to unlock the basement, which was an empty room under the stairs.
This was the first publically available build. It contains an ending in which the Neighbor catches the player trying to enter his basement, burying them alive. The unplayable version of Hello Neighbor seen in the announcement trailer.