Changes

Of courseSometimes, there are also the devs who don't merely use garbage data for padding but also bloat most bloated part of the game is the game data partitself, either intentional or because of poor design choices. For instance, many PSP JRPGs have a specific FMV movie duplicated a dozen times, and the Megaman Collection on GC GCN stores its sound data using an uncompressed format bringing the size of that portion alone to 1GB. In many of these cases, there's just not much you can do about it without destructively altering the game 's data.

So what do some people do? Note when I say , "deletedeleting" it often means replacing the file with a 1KB dummy file to prevent the ISO file structure from collapsing on itself, but sometimes such care isn't even put into ensuring it's still in a functional state. Some examples:

* delete all videos: this brings Super Smash Bros Brawl to 4.7GB(mainly due to Subspace Emissary).

* delete unused content you could get with emulator cheats like rooms and stuff.* delete "extra" languages other than Englishthe language you need.* If a game has multiple quests, they delete some then you could try deleting characters/quests they side-quest you don't like. Especially seen in compilations and stuff with demos includedas much.

Tools used for this are modding tools for rebuilding file trees, like UMDGen (PSP), Tinke (DS) and also regular ISO tools (PS1, Saturn)...

Since this results , in most of the case cases, in very noticeable detrimental effects in gameplay (if the game doesn't crash outright), this is nothing short of mutilating the game image. Some Sadly enough, some of these dumps make it to sharing sites sadly enough.

Avoid resorting to destructive modifications since it can lead to random crashes and unexpected behavior, especially in games with lots of shared assets. [[http://emulation.gametechwiki.com/index.php/File_Hashes Verifyyour dumps]] your dumps to make sure you don't have these, and if you still want to compress those reduce size, prefer using other methods or using uses decompression on demand. One reason to use a destructively modified dump is for burning your own Dreamcast games, as GD-ROMs were over a gigabyte in size and CD-Rs top out at 850MB.

* '''Archive-quality dump?''' No (destructive modRemoves data)