How 'Hell Levels' work.
 

I've done a little bit of digging and I haven't been able to find any information on why leveling worked the way it did in classic.

I remember hearing at one point that Hell Levels were an unintended result of how experience needed to level was calculated using their formula. I've been thinking about this for a long time and I can't figure out a formula that would behave this way unless you were specifically intending to make every 5th level past 25 take a ton more experience.

Does anyone know the backstory to hell levels or actually have the original formulas they used?

There's a chart somewhere on these forums that shows the various amounts of exp it took to get each level 50+ - I can't find it at the moment. Hopefully someone else can.

Good general explanation:

http://webcache.googleusercontent.co...c.php?t%3D1123

Ooh pretty.

http://www.project1999.org/forums/sh...7&postcount=35

Also, the FAQ under the Library here has some great info on all kinds of mechanics.