Something like FreeArc would be used nowadays for repacks, typically - there's gains to be made by tailoring your procedure depending on the type of game asset, and some of those decisions won't apply to general compression.
FreeArc Next does actually use zstd as above but it also does a lot of tricks with compression, dictionaries, etc while taking much longer to process.
As an example, looking at FitGirl's COD:BO3 repack, 180GB->42.4GB entirely losslessly. Not sure how regular compression would fare on the original game, though.
FreeArc Next does actually use zstd as above but it also does a lot of tricks with compression, dictionaries, etc while taking much longer to process.
As an example, looking at FitGirl's COD:BO3 repack, 180GB->42.4GB entirely losslessly. Not sure how regular compression would fare on the original game, though.