Using 3e's Tech Levels, or adding more Tech Levels beyond 12.

[malloyd]

Originally Posted by LoneWolf23k

Especially when GURPS Ultra-Tech ranks Star Trek as a "Safe-Tech TL12", which implies the Federation is at the limits of its tech evolution, when the setting is full of precursors with "god-like" tech.

On the other hand, Federation starships have [beaten] a fair number of god-like aliens too. Numerical TLs are never particularly meaningful, and particularly so for ahistorical or future TLs where they necesssarily are not grounded in much of anything. Even if you want to use them for something, I really recommend not using numbers at all, just give each technology package a name (TL/modern Federation) (TL/obsolete Federation) etc, and decide the defaults between them yourself. They don't have to all fall on a numerical scale, you can pick defaults between them that don't add up to the same total if you take different paths between them.