The .rar format itself provides several native benefits for managing retro games:

The game notoriously requires hundreds of repetitive duels to collect cards. These archives often contain custom registry scripts or completed system.dat files that instantly grant you a 100% complete card library.

This file often bundles heavily modified game versions created by the community. These can include upgraded HD user interfaces, entirely new card art, and even imported cards from later eras like GX, 5D's, or ZEXAL.

for the classic PC game Yu-Gi-Oh! Power of Chaos: Yugi the Destiny .