Warhammer: Vermintide 2

As with the other Bogenhafen achievements, this must be done on Legend.

You cannot get hit by a single Ratling Gunner bullet throughout the level. Sometimes they will appear before the finale, but the sprint to the end of the level will ALWAYS have Gunners shooting you from the boats. If you practice a speedrun of the level, you can easily get to the finale bit in about 10 minutes, and the only hard part is where you have to hold out in the storage room. The only thing that can ruin a run after that is a monster spawn, which blocks the way forward.

Now for the finale. If you're lucky enough to have a group, have one of you run ahead (preferably someone who has potions and is going for "Old World Dash: Bogenhafen", as that achievement is rewarded on an individual basis, not for the whole group). The Gunners should aim the person dashing to the end, meanwhile the rest of your team can jump off the walkway and dangle until the end of the level, and the Gunners shouldn't shoot you. If your runner is confident they won't fall, have everyone die just before the end event so there is no possibility of getting shot. Assuming everyone but the runner gets this achievement, you can run the mission back and have someone else do the running bit, and the first runner can get this achievement.