Video game protagonists define stoicism. Every time a hero is called upon to save the world, tragedy befalls him and yet he presses on without complaint. Sometimes he won't even utter a word. At least one of his friends or family will get murdered, he's forced to make difficult moral choices, his home is burnt to the ground, all his equipment gets stolen, he gets betrayed by those he trusts the most, he's revealed to be a secret villain and for certain he will have to brutally kill hundreds of people. He does this in post-apocalyptic dystopias, poorly-lit dungeons and the various circles of hell under constant pressure, and subtly oppressive conditions like ammunition scarcity and everyone trying to shoot him.
These heroes can put up with basically anything. In the event of a personal disaster, they never seek nor are they given any opportunities to wallow in self-pity or take a moment to compose themselves. After a parent or love interest is executed before their eyes, a voice in their ear barks "Soldier, there's no time to mourn them; we need you to get on that turret!" They'll get on that turret, and pump their fist when they bring down a helicopter.
Video game heroes, like sharks, never stop swimming. If you need to pull aside a shark for a quiet, personal conversation, the shark says "sorry, dude, I'm a shark, I have to keep swimming or I'll die." This is why sharks make for shitty friends but why video game heroes are beloved by their fictional constituencies. They are dependable and resolute in any crisis.
It's common practice for one of those guys, in a single day, to chainsaw his way out of the belly of a giant worm, take a detour through a zombie shantytown, euthanise his long-lost wife, and spend hours in a sewer trawling through blood and waste, with monsters leaping up at his face and depositing their brain matter on his boots.
How surprising would it be to emerge from the sewer to an NPC colleague who exclaims "Soldier! Oh my God, I can't believe what you've gone through! That must have felt absolutely horrible, I can't even imagine what kind of pain you're in. Are you OK? Don't worry about the objective, I'll get someone else to take care of that. Let me buy you a drink, you can tell me all about it."
Experience would never teach him to expect that. The hero would probably get confused and shoot the NPC. Pausing over the corpse, he quickly runs off to blow up aliens at a water treatment plant.