To repeat myself from a response to another user:

You don’t even need the deep lore hidden text and recordings for Doomguy. The show-not-tell storytelling is fucking amazing in Doom 2016.

Like they don’t need any deep lore dumps or in depth explainations. The simple and casual disregard of Samuel Hayden for the lives of his employees and everyone else on Mars is in direct contrast to how deeply it’s immediately obvious that Doomguy DOES care about those same dead scientists and colonists just from a few simple actions.

No long-winded explanation necessary. Those 10 seconds were a masterpiece of visual storytelling.