Played world of Warcraft on it a few times now. Last session was over 9 hours. Air ran great, got warm but not hot. I cap the frames at 45 FPS to balance performance vs heat output. Ran slick throughout. Been levelling in shadowlands and had multiple occasions of raid like encounters, e.g. multiple players attacking with lots of spell effects, stuck to the 45limit like a champ.
wC3 likely runs a bit hotter as it’s not native, Diablo 3 certainly gets the temp up, not played WC3 reforged on it yet tho.
(note: it will happily run at 60fps but gets quite hot after a while. Having played WoW since launch on Macs I am used to tweaking settings to get the best out of the game without deafening fan noise or burning the Mac up. So it’s worth sacrificing some FPS for a smooth cool experience)