The developer occasionally releases "compressed" versions of the game builds. The primary feature of this build is a drastically reduced download size (saving hard drive space and download bandwidth) without sacrificing much in the way of visual quality.
This specific file serves two main purposes depending on its label: SuccubusContract-v0.19.9_Patreon_Compressed-pc.zip
Or are you trying to troubleshoot a when extracting or running it? SuccubusContract-v0.19.9_Patreon_Compressed-pc.zip
The developer brought in dedicated editors to clean up the English text, fixing dialogue and making the story flow much more naturally compared to earlier machine translations. SuccubusContract-v0.19.9_Patreon_Compressed-pc.zip