Kio's Adventure V1.0.3 Fitgirl Repack seems to refer to a repackaged version of the game "Kio's Adventure" by Fitgirl Repacks, a well-known entity in the gaming community for creating and distributing repacked versions of games.
That said, if the developer ever re-releases an official version, supporting them is the right thing to do. Kio-s Adventure V1.0.3 Fitgirl Repack
: The game is noted for its sharp contrast between "cute" pixel art and visceral, "horrific" death scenes. Localization Kio's Adventure V1
The repack uses advanced compression algorithms (LZMA2, Brotli). On an average SSD with a quad-core processor, the installation takes about 5–8 minutes. On older hardware, expect 15–20 minutes. Localization 3
FitGirl is known for shrinking game files to their absolute minimum size without losing data. For a pixel-art game like Kio’s Adventure, this means an incredibly fast download even on slower internet connections. 2. "Fat-Free" Installation
Players guide 16-year-old Kio through a series of "dungeons" while attempting to find her missing friends, Domini and Illusion. The gameplay features: Kio's Adventure (PC) Review - HonestGamers
For purists, V1.0.3 is the only version worth playing. Earlier builds are unstable; later fan-patches sometimes introduced bloat. This version strikes the perfect balance.