This is a sub-page of A Hat in Time (Windows, Mac OS X)/Version Differences.
After A Hat in Time released on PC, the game received quite a few updates, with two DLC chapters being released by the summer of 2019. However, in-between the releases of those DLCs, some builds accidentally had WIP DLC provided in it, allowing an early look at the design and coding for both The Arctic Cruise and Nyakuza Metro. There was also a debug build that was accidentally pushed on December 11 2017 that allowed a few normally editor-only functions to run in the cooked game.
May 28 2018 DLC 1 Leak BuildA leak of almost the entirety of The Arctic Cruise, and contains several early versions of various models.
September 29 2018 DLC 2 Blockout BuildAn extremely early version of Nyakuza Metro that appeared in a build not long after DLC 1 released.
April 2 2019 DLC 2 Leak BuildsBy far the biggest leak for DLC, containing practically all of DLC 2 and Online Party. Contains minimal differences to the finished version of the DLC, which was released a little more than one month later.