Ah, 'Sortie the Witcher'—that quest threw me for a loop the first time I played 'The Witcher 3.' It’s one of those missions where you’re helping Vernon Roche and his Blue Stripes, and it’s easy to miss some key steps. First, you’ll need to head to the rendezvous point near the Temerian Partisan hideout. Roche will brief you about the Nilfgaardian forces, and then you’ll have to sneak into their camp. I recommend using Cat potion for better visibility at night, and don’t rush in swords blazing—stealth is your friend here.
Once inside, you’ll need to plant explosives on the ballistae. This part can be tricky because the guards patrol frequently. I found it helpful to save often and time my movements between their routes. After planting the charges, you’ll regroup with Roche for the final assault. The battle’s chaotic, so keep Quen up and watch for archers. The quest wraps up with a choice about how to deal with a certain traitor—no spoilers, but your decision affects Roche’s attitude later. Personally, I love how this quest blends strategy and moral dilemmas, classic Witcher style.