Location: This quest can be found in Snaerfelt.
Objective: Defeat the Type G0 that Killed the Knight’s Brother
Head to the campsite in southern Snaerfelt and keep battling Killing Machines until the Type G0 shows up. Defeat the Type G0 then return to the knight in northern Snaerfelt. Talk with him to complete the quest.
Reward: Metal Slime Amour