The White Rider trophy/achievement in Middle-earth Shadow Of Mordor is one of the more tricky ones. You have to liberate 30 slaves within 180 seconds while on a Caragor. This guide will help you find the sweet spot to net you that achievement.
This is best done in the Sea of Numen with max Elf-shot and max Focus. Grab yourself a Caragor and make sure it is at full HP on the off chance it takes some damage.
This is the best route I’ve found to consistently find slaves roaming with Uruks. Do this during the day and use your wraith vision to see where the packs are. Sometimes you can find them in the ruins on the route as well but don’t linger to long in those. If you can use the head shot fear rune on your bow so when you land a head shot the other Uruks will flee and you can keep moving.
This is where you want to start on the map. As you can see there is a road and if you keep on that road during the day you will find a couple Orcs walking with 5-8 slaves as you go. Use focus head shots and keep moving. Don’t forget to sprint with the Caragor.
When you reach the point below you have gone far enough and you can turn around. Slaves and Uruks will respawn pretty quickly on the road so if you didn’t get the achievement yet you will on the way back. If you run out of arrows but think you are close just run through with your Caragor and swing for the fences. Killing one or two Uruks in a pack will free the slaves. Don’t forget to check out the ruins for extra slaves!
