Looks like it is from a rpg book, not a computer game. My first guess was GURPS by Steve Jackson Games (General Universal Roleplaying System) - but I'm leaning towards one of the oldest roleplaying games (which AFAIK has been "computerized" several times): Traveller.
The "tech level" indicates which level of technology is needed for a particular piece of equipment to be available and/or normal (won't get you burned at the stake for using "magic") - in Traveller it is used to label different worlds in the universe AFAIK - with GURPS it also extends to cross-dimensinal travel, alternate realities, time travel etc.
It is indeed Traveller; MegaTraveller, to be precise.
In those tech levels the best we could claim to be is early TL9, with laser weapons &c. We're supposed to have early fusion power, FTL and anti-gravity by the end of TL9, IIRC. I think that TL11 mentioned in the list is at a level where those three technologies are well established and their use routine.
The "tech level" indicates which level of technology is needed for a particular piece of equipment to be available and/or normal (won't get you burned at the stake for using "magic") - in Traveller it is used to label different worlds in the universe AFAIK - with GURPS it also extends to cross-dimensinal travel, alternate realities, time travel etc.
https://en.wikipedia.org/wiki/Traveller_%28role-playing_game...