The .rar extension refers to the WinRAR compression format, which is standard for these types of community-shared game files.
"Part 1" usually indicates the first segment of a larger game (like GTA V , Far Cry 4 , or Watch Dogs ) that was popular and frequently downloaded in multi-part archives during 2014 . download-2014-apun-kagames-part1-rar
This site is known for hosting a wide variety of highly compressed PC games from that era (circa 2014), often split into multiple .rar parts for easier downloading. Far Cry 4