Shadow of Mordor's Nemesis system, which made sure you had as many interesting enemies as you want throughout the story, was one of the most interesting aspects of the game. It also opens the door to play the game as if you were a Pokémon trainer.
Here are the rules, care of redditor Slo-MoDove:
- You are not allowed to interfere with a Captain battle. Your captain must only battle another by himself. (An exception is when there are too many Uruks around, but you can only pick them off with Elf-Shot from a distance).
- When the enemy Captain is weakened (green) or retreating, only then can you jump in to catch (brand) him.
- You can only have 6 branded Captains on your team at the same time.
- No branding War chiefs. Only your branded Captain can make his way up through the ranks with leveling and finally defeating a war chief.
You're no longer the hero of these battles, just a proud trainer trying to be the very best, like no one ever was. (You can sing along if you'd like.)
These rules found their way here through the excellent No Wrong Way to Play tumblr run by erstwhile Gearbox writer Anthony Burch, who collects interesting meta-games and posts about them. If you've ever made up your own rules for a game as you were playing to make things a bit more interesting, you know what he's talking about.
It's the site that introduced me to Smash Potato, and it's worth a few visits to learn these weird ultimate rules for games you may have already beaten.