Can go down to 480p and be legible, but runs into some UI clipping issues at 4:3 (minimal)

Thats a great engine right there. Takes a resolution like no problem. In game its hard to fine tune the gamma as there is no reference icons for calibration.

UI issues when going to 600p, also feels cluttered in 4:3. On the plus side it will render any resolution your gpu can send it.

Source games always play well on CRTs At 480p this looks better than CSGO; as the art style was designed with sub HD in mind

Source games always play well on CRTs

Source games always play well on CRTs