All The Demon Fort of the Yellow Heaven Flag Locations in Wo Long

Battle Flag 1: Found at the start of the mission. Jump onto the rocky platforms to your left and follow the path.

Marking Flag 1: After dropping into the caverns, defeat all enemies. Follow the path southeast and jump over a small rock to find the flag. Beware of an enemy above to the left who throws fireballs and ranged Critical Blows.

Battle Flag 2: Near the previous flag, jump onto the platforms to your left (where the warlock was) and go up the slope into the open area. The flag is next to a rickety fence.

Battle Flag 3: From Battle Flag 2, look northeast to see another flag by a building. This is a locked flag requiring you to defeat a nearby Leader and followers. Go down the slope, then left to a climbable wall. Jump across roofs, opening a chest, until you reach the large building above the flag. Defeat the Warlock and the aggressive spear user on the roof. Attack the Ranged Attacker to the east. Perform a falling Fatal Strike on the Leader below to halve their health. You can use ranged weapons to take out followers on the roof before dropping down. Interact with the flag after defeating enemies.

Marking Flag 2: Located in a house guarded by three enemies near Battle Flag 2. Jump onto the wall to the west, return to the roof above Battle Flag 2, and follow wooden platforms up the eastern wall to the back roof. Head south on the rooftops until you are opposite a Marking Flag. Drop down to the enemies below, defeat them, and activate the flag in the house they were guarding.

Marking Flag 3: Head west through the building where a guard sits with their back exposed. Be aware of an enemy to the right of the door waiting to backstab you. Alternatively, follow platforms/roof to the right of the house. Head up the slope southwest into a cave. Defeat the hedgehog-type enemy to your right, which uses a spinning roll Critical Blow. Around the corner is another flaming hedgehog that explodes. Continue up the slope to an open area. Find the nearby Marking Flag on a wooden tower. Jump to the eastern ledge below, drop again, defeat the enemy, and climb the long ladder back up. Rotate southwest and make a diagonal jump onto the tower with the flag.

Battle Flag 4: Climb back up the ladder and head east onto the ramparts. Beware of a lunging stab Critical Blow from an enemy. Follow the ramparts south to a narrow wooden bridge. Look left and jump towards the gate. Turn 180° to find the Battle Flag, located near the gate and guarded by a tiger. You can jump from the ramparts above to avoid the tiger.

Marking Flag 4: From Battle Flag 4, enter the ramparts via the south path (left of the flag if facing the tiger). Follow the path west, defeating a zombie. Walk onto the wooden platform, being careful of an axe enemy. Look left; the Marking Flag is in the alcove below. Wait for the Demonized officer patrolling the path to move away, then drop to activate it.