Showrunner Michael Schur wrote a book about the philosophy research they did for the show.

The audiobook has the full cast doing bits, sketches and explainers

Left 4 Dead 1 & 2

Killing Floor

Deep Rock Galactic

Here’s a big eclectic mix of

Transatlanticism by Deathcab for Cutie

Time Out by the Dave Brubeck Quartet

Cubafrica by Manu Dibango

E MO TION: Side B by Carly Rae Jepsen

Home is Where Your Heart Was by Plej

Vampire Weekend by Vampire Weekend

Left and Leaving by The Weakerthans

Flood by They Might Be Giants