But as I said they were never as commonplace as popular fiction (films andliterature) lead us to believe. the only real one I know of is completly differant to the flails that you guys are thinking of and I study the damn subject.
Ok you study the subject and I know you know more then me about them.
I actually just learned something... A http://www.ritterruestung-handgeschmiedet.de/englishversion/weapons/pictures/morningstar.jpg was sometimes referred to as a Morningstar as well. Basically any weapon that features a spiked ball (whether it has a chain or not) was refered to historically as a morningstar.
A http://www.armouronline.com/foto/produkty/titulni/628_flail.jpg. As weapons inspired by the grain-threshing flail used by farmers the militarized versions often had the http://images-mediawiki-sites.thefullwiki.org/09/3/1/0/70324611480769324.jpg.
The two types of weapon are almost polar opposites as far as handling goes. As one would imagine, wielding a weapon that's a one-handed chain weapon with a shorter handle, longer chain, and ball instead of rod would be totally different then the two handed flail which would be wielded more like a polearm.
The best term I've found to describe it is Kettenmorgenstern - literally 'chain-morningstar' in German. That distinguishes it from the fixed morningstar ('Morgenstern' in German), and also from the 'true' flail, which was more like a giant nunchaku (the nunchaku itself possibly also derived from the agricultural flail).
but all of that is besides the point...
Your confusing real world functionality and practicality with Fictitious video games. Video games can do whatever they want really. Sure it does need to have a form of realism to keep you immersed but I don't see this as any reason not to have flails is all I'm saying. It doesn't make Flails or Morningstars any less of a practical weapon for a video game and there's no reason why real life misconceptions about the weapon should spur people into not wanting them in a video game.
For the record. When I voted on Flails I voted on Morningstars. The ones I'm talking about in all my posts previous to this look like http://www.ringgame.net/SecondAge/weapons/flail.jpg.