How? By repacking:

Modern repacks use high compression, which requires time. On a Core i5 with 8GB RAM, expect 45 minutes to 1.5 hours .

No. A legit copy (even the standard edition on sale) gives you stability, online play, and peace of mind. If you must compress, use trusted repackers (e.g., FitGirl, Dodi) and compare checksums—but even then, expect trade-offs.