Which Games Converted to d20 have the feel of the orginal?

[ColonelHardisson]

I think CoC d20 is well-done, having nixed classes, but I can't compare it to the old version because I haven't read or played that one. Perhaps they should have made HP equal Con+level or something like that (a gun doesn't much care what level you are). Still good, though.

They adjusted the rule about massive damage causing death - it's a lot easier to die from a single attack in CoCd20 than it is in D&D.
Characters must make a Fort save, DC15, after any single attack that causes 10 or more points of damage - or die.