It is most definitely possible to plan 32-bit games (at least via Steam) on NixOS. The only things not to forget is to enable "hardware.opengl.driSupport32Bit"

It is most definitely possible to plan 32-bit games (at least via Steam) on NixOS. The only things not to forget is to enable "hardware.opengl.driSupport32Bit" and "hardware.pulseaudio.support32Bit". Other than that, just installing the Steam package usually should work.