[quote]1x1 is more or less just two people.[/quote]
I thought it was more specific, but good to know.

[quote]Is there a specific game or system you have in mind for this?[/quote]
[b]Systems / Games[/b]
Fantasy AGE / Dragon AGE
Alien RPG
Blue Planet v2
Cold & Dark
Dark Heresy 2e
Delta Green
Dishonored
D&D 5e (free SRD)
Fate (preferably Condensed, definitely not Accelerated) (free SRD)
Forbidden Lands
Gumshoe
Ironsworn (free)
Legend in the Mist (free)
Level Up 5e (free)
Mass Effect 5e / Fate
nWoD (mundanes)
Pathfinder 1e (free SRD)
PbtA
Savage Worlds
The Void (setting only) (pwyw)
Tricube Tales (free)

[b]Genres / Settings[/b]
cyberpunk
post-apocalyptic
hard sci-fi
gritty space opera
dark fantasy
space fantasy
gaslamp fantasy
WFRP
Westeros
Conan

That's not all, I have a frightening amount of purchased games from Drivethru -- these are the one I could quickly gather.