Wall of Valor in Dying Light 2

To start this task, you need to complete the "Last Will" quest, or talk to Kira inside the Peacekeeper ship, on the floor with the cafe and detention cells, behind the ajar red door. The reward is three army dog tags (commemorative souvenirs), a cassette, 3000 combat points and 1000 parkour points.

Wall of Valor 1

Head to the Timing Lab at the marked location in Downtown. I strongly recommend doing this at night so that there are fewer infected people. Upon arrival, you will receive a cassette. Go to the timing lab and follow through the third floor to the second. Follow the trail using Survivor Sense to find Sierra's corpse. Take the army dog tag, continue down to the first floor and look for Ron's corpse near the door. Right at the front door. Take his army dog tag and go inside. Look for the third corpse on the floor, Kiddy. Take the token and return to Kira.

Wall of Valor 2

The task can be taken along with the previous quest. Head to the Houndfield Gym at the marked location in the Houndfield area. When you arrive at the place, get the cassette. Enter the gym and follow up the stairs. Be careful as there are mines everywhere. Crouch down and search the corpse of Barthez. Take the token and return to Kira.

Wall of Valor 3

Head to the military base in Newfoundland, far south. When will you arrive, receive a cassette. Enter inside the complex and go through the doors of the east wing to find footprints. Follow them through the building, follow into the far room and search the corpse of Atom. Take the army dog tag and follow the trail back to the stairs leading to the basement. Climb down and kill the infected. Soon you will reach a room with a charger and Brask's corpse. Take the token and return to Kira.

Wall of Valor: Leon

The quest will start automatically after the three quests above. Head to the Garrison Radio Tower, go inside and take the elevator down to the basement. Swim through the flooded corridor and up the stairs. Use the Survivor's Sense and move through the broken vent. Then follow the tracks up through the theater, where you will find Leon's biter.

After defeating him, search the corpse, take the token and return to Kira. Choose any option. It won't affect anything.