The v1.0.2 update—often found in the archive you mentioned—brought several refinements and content additions to the base game. Key highlights from early version histories include:
: Addressed initial launch glitches and performance issues. Big.Fat.Neighbor.v1.0.2.rar
: The neighbor is known for making a robotic drill sound when he spots you. The v1
If you're planning to extract that .rar and play, here is what you'll need according to the PCGamingWiki : Big.Fat.Neighbor.v1.0.2.rar