Middle-earth: Shadow of Mordor

will be achieved on the way to Master of the Wilds achievement. but first 4 are below.

Challenge #1 – Kill Three Ungol Spiders
simply run after spiders and tread on them, can be found mostly in open areas or caves.

Challenge #2 – Kill Five Flying Creatures
go to a taller building or forge tower in the first area of the game and look into the sky, use focus to land the shots.

Challenge #3 – Kill Three Caragors
easiest found in cages around uruk camps. open cage, 2 fully charged elf shots to the head.

Challenge #4 – Kill Four Mordor Rats
found in uruk strongholds. easiest done with luck hitting camp fires and explosive barrels