Talk:Arms Dealer/@comment-122.149.137.160-20130218211934/@comment-3157150-20130312060034

Corruption/Hallow will stop NPC's spawning. Also, I'd recommend checking the lighting again, or recreating the houses themselves (larger, wooden walls, wooden background walls, lots of lights, table, chair, door, no platforms as part of the floor).

@Cilan Cronus: Cracked Terraria will not cause that to happen, believe it or not. It's a modified steamAPI.dll that allows it to work, and Terraria's NPC spawning algorithm doesn't depend on that file at all.