Dreampark (sort of)
Dreampark was a series of novels by Larry Niven and Steven Barnes throughout the 80s and 90s. I liked reading them when I was a kid, and even went back to the first novel recently. The books are basically science fiction about a far-future LARP theme park where people played competitive games as part of a popular league.
I think that this kind of meta game could make for a fun campaign - players as pro or semi-pro athletes participating in reality show competetive adventure LARPing, relying on a combination of character traits and actual factual skill... with the plot extending outside the game itself from time to time.
While a Dreampark rpg was published by R. Talsorian Games, I wouldn't be using it (or the Dreampark setting itself as written) because it's not exactly a pinnacle of mechanical design. Instead I think I'd go with GURPS - it has a level of detail to differentiate base player capabilities from the character they'd be taking on in any given LARP adventure.
One of the keys here is that some capabilities in the Games are determined by your players' actual abilities, and some by their character class and level. Maybe Fighter type characters can take more virtual "hits" in augmented reality combat, or Snipers have stronger computer assisted aim; their targeting reticule is bigger. Maybe the thief character is the only one who can pick locks, even if the player themselves knows how.
Anyway, that's my idea. Thoughts?