Sideway: New York
10 Achievements
4-6h
Pacifist
Complete level without killing anyone
3.5%
How to unlock the Pacifist achievement in Sideway: New York - Definitive Guide
This is a pain to do. I strongly suggest you do this after you have all the powers unlocked, or at least the Glide skill. Whenever you are falling in an area, glide down by holding , making sure you don't land on an enemies head.
If you kill anyone, just hit and restart the level. If the stage automatically kills anyone (such as the monster that falls on spikes in Alley 1), or requires you kill anyone to progress (such as in Alley 2), then you won't earn the trophy . I did this on the third stage (Jamaica 1).
I found Jamaica 2 is a much easier level for Pacifist. The only tricky section is the introduction of the laser lock-on guy. But you can jump over him if you time it right. And if you die at that part, the checkpoint is right there (dying doesn't affect the trophy).