These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Horror: The low-resolution graphics and fun nature of the game make it hard to initially notice how horrific a death you are inflicting against your opponents.
In Dig Dug II, you can kill enemies by jackhammering the ground beneath them so they fall into the water. At the end of the level, any remaining enemies will try to escape by... jumping into the water. Are they committing suicide?
I Am Not Shazam: Dig Dug actually refers to the events of the game, canonically known in the Dig Dug/Mr. Driller universe as "The Dig Dug Incident".