For those looking at "Part 2" or "Season 2" files, you are generally looking at the content updates released shortly after the game’s rocky launch. These updates were intended to be part of a rolling episodic season:

Later versions included much-needed character immunity (damage and grapple) immediately after respawning to help players re-orient in chaotic missions. A Community Kept on Life Support

A significant patch that rebalanced the notoriously difficult human snipers , increasing their aim time from roughly 2 seconds to over 4 seconds to give players a fighting chance.