Downloading Call of Duty: Modern Warfare 2 (2009) from unofficial "highly compressed" sources like Facebook or file-sharing links is highly discouraged
A "highly compressed" version usually strips out unnecessary language files and cinematics, bringing the size down to roughly 7GB - 11GB (vs. the full ~12GB+ on Steam). 3. System Requirements for MW2 (2009) Downloading Call of Duty: Modern Warfare 2 (2009)