Tekken 7 is a heavy game. With all the DLC and high-definition textures, the official installation can bloat to over 100GB. A "Repack" takes this massive archive and compresses it significantly, allowing players with slower internet connections or limited hard drive space to experience the full "Ultimate Edition" without downloading the unnecessary bloat of multiple language packs or redundant files.
If you want single-player, local VS, or modded Tekken 7 (mods work perfectly with repacks), this is the definitive version. For online, buy the official game during a sale. tekken 7 ultimate edition v510 repack