When we say the hacked ROMs for Genesis had the graphics "decompressed", that's not exactly the right terminology.  The graphics that are used, at least in the EA series that I've looked at, have shared tiles.  They are not "compressed" as you can still see all the graphics when you open Tile Molester, but it won't look exactly like the "what you see is what you get (WYSIWYG)" in the game.  That's due to the use of shared tiles.  Back in the 90's, chip size was important/expensive, so the smalle