There used to be a mod/total conversion called "Damage". planetunreal.gamespy.com/View.php?view=U2Files.Detail&id=45
This link doesn't seem to work anymore but I do recall this mod. You had a katana and there were city themed maps.
There was another TC, unfinished, crystal element. That one however replaces some crucial files so its important to keep your config and even the golem files. It's not done well, they should have added a separate directory/config file.