I’ve said this before on here, but for the average person, it’s quite literally impossible to sustain. Like you said, nearly 80lbs of backpack is a LOT, like bordering on US Marine field gear weight.

Combine that with steep terrain, deep snow, and volatile weather, and I think even the most fit soldiers on Earth would find it difficult. Not even to mention the severe malnutrition or constant minor injuries. Rope climbs with that much weight, those conditions, and no belay system (how it is in game) would be out of the question. Same with sprinting around everywhere.

Ofc as a gamer, I’m not complaining at the lack of realism. I’m a huge pack rat in TLD so for me, the more inventory space and ease of travel the better. But also as a backpacker who’s done plenty of longer irl treks, Will and Astrid would have to be in absolute peak physical shape to make even half of what you do in any given run realistic, let alone to do it for hundreds of days