If you get killed by a particular enemy in a level, the next time you retry the level that enemy will be leveled up some.
It turns “oh this part is hard for me” into “JFCWTF?!” which is good for people who like to be frustrated and hate themselves, and also can make it feel like there’s more story development instead of replaying exactly the same level again and again
This seems like a great way to ensure that the player can't beat the level. I assume there's a maximum difficulty where the enemy is still possible to beat?
Also, when does the boosted difficulty reset for the level? After beating it? I am not a fan of frustrating games, so I can't even imagine playing a game like this without just quitting.
Nah, that person is just REALLY bad at video games and salty.
First off, there aren't really "levels". It's an open world with missions.
The enemies that get stronger gain specific abilities that prevent you from taking them out with specific strategies (some are immune to stealth, some are immune to archery, etc).
Each nemesis enemy also has specific weaknesses that can be learned about before going into combat.
To add to what the other two commenters said: as the nemeses gained rank in Sauron's army (from surviving fights with you) the reward you get once you do kill them gets better.
This means you could pick a guy who's attack patterns you know and are good at countering and start just taking dives when you fight him and once he's high enough rank you kill him for the improved rewards.
I think this system would work well is a bunch of other game types, but alas we won't see that until the patent expires.