The beginning to Tomb Raider was incredibly baffling. It put a massive focus on survival, with the tutorial for the bow (the main weapon in the game) focussing around hunting. It made it seem like this was going to be a central mechanic, with the player having to stalk prey and remember to eat food.
But even the game realised just how pointless that was, and completely brushed past it as soon as possible. The option to hunt was always there, with plenty of animals running around, but there was no incentive to actually pursue that. All you got was a little XP.
It was obviously intended to be a central mechanic, as the bare bones exist in the game. However, over the development time, the idea was scrapped leaving us with a mechanic that no one used, and that no one cared about.