I'm not entirely sure how familiar the Long Dark community is with Fallout, but in New Vegas, the player can choose from an array of about 20 skills. All these skills range from 1-100 in terms of points, and each one had an individual purpose and tangible results in game. For example, leveling up your "guns" skill would result in better hitscan results (more accuracy) and an increase in damage with weapons falling under the "guns" subsect. Another example would be stat checks. An easy level lock needed a lockpicking skill of 25, and only after that skill is at 25 will it be possible to even attampt that lock. I'm not entirly sure how well it would translate into a game like The Long Dark, as it would go against the original idea of it. That being to create an experience rather than a video game. However, maybe it could be toggleable among other things. I personally adore progression systems, it is why I love New Vegas, and I could see myself experimenting for days.