The online racing simulator
PC games with Karts:

Live For Speed

Automobilista

Kart Racing Pro

Project Cars

Assetto Corsa (with kart mods)

rFactor (with kart mods)

Project Cars 2 (when it releases in a few months)

KartKraft (whenever it releases)
Quote from BeNoM :PC games with Karts:

Live For Speed

Automobilista

Kart Racing Pro

Project Cars

Assetto Corsa (with kart mods)

rFactor (with kart mods)

Project Cars 2 (when it releases in a few months)

KartKraft (whenever it releases)

rfactor2
2

FGED GREDG RDFGDR GSFDG