Based on Silence_The_Whispered_World_2-FLT ISO release: flt-stww.iso (3,670,339,584 bytes)
Official GOG update v1.1.20227 (901 MB) installed over
100% Lossless & MD5 Perfect: all files are identical to originals after installation
NOTHING ripped, NOTHING re-encoded
Selective download feature: you may skip downloading of German/Polish/Chinese voiceovers & unused files from PS4 version of the game
Significantly smaller archive size (compressed from cumulative 4.3 to 2.5~3 GB)
Installation takes 3-5 minutes (depending on your system)
After-install integrity check so you could make sure that everything installed properly
HDD space after installation: up to 7 GB
Language can be changed in game settings
OS: Windows Vista/7
Processor: 2.5 GHz (Single Core) or 2 GHz (Dual Core)
Memory: 1 GB RAM
Graphics: OpenGL 2.0 compatible with 256 MB RAM, Shader Model 2.0 Support (Shared Memory is not recommended)
DirectX: Version 9.0c
Storage: 1800 MB available space