Weird Audio Track Related Question, Noise Reduction

so here's the situation, I captured a livestream where I was supplying commentary over video game footage - but in putting the thing together I found my audio was too quiet (or the game footage was too loud, whichever way you want to look at it) - I'm looking for the audio equivalent of chroma-keying, as I have the pure videogame audio from a second recording done simultaneously, hopefully keeping my actual voice recording intact, that way I can replace the game audio with the quieter more pure version. is this possible?