What is deltarunevita?

DeltaruneVita is an unofficial fan project that ports the video game DELTARUNE, chapters 1 through 5, to the PlayStation Vita handheld console. It does not include or distribute any of the game's actual assets or files. Instead it works as a patcher and runtime that takes a legitimately purchased copy of the Windows Steam version of the game and converts it to run on the Vita, so a player still has to own the original game. Since version 0.36, the project runs the game's data directly from the Steam release using a custom implementation of a tool called Butterscotch, with graphics rendered through a library called VitaGL. Earlier versions relied on an Android release of the game as the source of assets, but that is no longer how it works. The README lists overall progress at around 60 percent complete, and breaks down the state of each chapter: chapter 1 has been reviewed room by room and is considered fully verified, chapter 2 received a broad set of fixes for audio, battles, and performance, chapters 3 and 4 are playable but still being tested, and chapter 5 is the hardest part to optimize because one area is especially demanding on the Vita's limited hardware and can cause low frame rates or crashes. Setting it up is a multi step process. A user needs to install a few community plugins on their Vita, including kubridge and FdFix, then run a Windows based patcher program against their own legitimate Steam installation of the game to generate the Vita compatible data files. Those generated files, which are roughly 1.1 gigabytes, then get copied onto the Vita's storage, followed by installing the provided VPK application file. The project supports the Vita's touchscreen for virtual controls and its analog sticks for adjusting the zoom level, alongside the standard button layout adapted from the game's PlayStation 4 release. The README does not state a license.