The smallest Saturn game I've seen is Batman Forever: The Arcade Game, which IIRC was something like 8MB.
Many saturn games are small once you remove the FMV and CDDA. In fact same goes with PlayStation as well. Ikaruga on the Dreamcast is also very small in size as is Under Defeat and a few other shooters. There's not much in them you see.
4mb? The regular Ikaruga image that can be found on the net weighs 19mb, which is still ridiculously small.
Check the thread, though. It's in the Saturn section. It's about Cotton 2 - a Saturn game. People then mentioned other Saturn games. Yakumo mentioned Ikaruga (and that's it's a DC game) as an aside. You're going waay off topic, there ;-) I was talking about SATURN games! ;-)
Before the advent of quality internet connections and file transfer solutions beyond FTP and usenet people did rip the data seperately from the audio and downsample it into MP3s. Really sucked.
Ikaruga was originally an NAOMI cart. Cotton 2 was an ST-V cart. Because of that these games were actually made using their respective systems synthesizer hardware and software libs, then using MIDI for music. That alone could reduce the games to sizes that could compare to for example a game like Heavy Nova on the MEGA-CD and it's counterpart in cartridge.
