Leveling: The level cap is reduced from 50 to 35, the amount of XP required to level up is increased by 33%, and various quests had their XP rewards tweaked. This is an overview of JSawyer's main features based on the current version of the mod (5.1). While it is considered unofficial by its creator, it does provide insight into the aims of the lead developer and contains planned tweaks that never made it into the final release or in official patches.
It also includes several technical fixes and tweaks (particularly to the Karma system), that were not included in previous patches. JSawyer is a personal modification created by project director Joshua Eric Sawyer for those willing to experience a harder, more challenging Fallout: New Vegas and was released on December 29, 2011.