While the original game is massive, "highly compressed" versions often come in different tiers. A 100MB version is extremely aggressive. Typically, a file of this size will be a "repack" or a "stub installer." To achieve 100MB, developers of these versions often use these methods:
Disable Antivirus Temporarily: Compressed installers often use "cracked" files that antivirus programs might flag as "False Positives." Use caution and re-enable it immediately after. While the original game is massive, "highly compressed"
Stripping Cutscenes: High-definition video files are the heaviest part of the game and are often removed.Audio Downsampling: Reducing the quality of music and voice lines to save space.Texture Compression: Lowering the resolution of character models and environments.Multi-Part Archives: Sometimes, the 100MB file is just the first part of a larger download. System Requirements for Ultimate Ninja Storm 4 While the original game is massive