4ed Tech Levels?

[David Johnston2]

Originally Posted by Fred Brackin

No, the progression beyond 2 TLs may have appeared in some early book. There were indefinite upgrade rules in Uplift 1e for example but by the time of the 3e UT Revised the progression stopped at 2 TLs and 1/4 price and weight.

And even that was problematic. Looking at cars, pens, pistols, crowbars, rope, telescopes and anything else that comes to mind, what actually followed that progression over the last 2 TLs?