Dig this

I've been remiss in not reporting this item sooner.  Starships & Spacemen second edition is a project from Goblinoid Games that takes a musty old sci-fi rpg and updates it to full compatibility with Labyrinth Lord and Mutant Future.

In case you're new here: Labyrinth Lord is the retroclone closest to Basic/Expert D&D and if add in the Advanced Edition Companion it also emulates they way AD&D played when I was a stupid kid who didn't know you "couldn't" mix AD&D and BX.  Mutant Future is an almost-clone of Gamma World that more compatible with LL than Gamma World was with BX/AD&D.

Adding a full-blown sci-fi option to this scheme is pretty much my definition of rock solid awesomeness.

This project is already fully funded, so if you kick in five buck now you will be getting a PDF of this game.

Know no limit!

And now a simple-minded solution to the problem of level limits for demi-humans:

The basic deal here is that demi-humans may continue to advance past the traditional limits, but their XP charts don't flatten out the way they do with humans. The numbers above are good for Labyrinth Lord, but similar charts could be easily whipped up for any version of the game where race equals class or where the class list is short.