A common problem in top-down RPG's, the Annoying Townsfolk is when game NP Cs with collision detection:

• Actively seem to get in your way and prevent you from getting about.
  • In particular: doorways, the standing in thereof
• Walk around randomly, particularly in small spaces
• In the worst examples running into an NPC will cause you to enter conversation mode - meaning that not only do they get in your face and block your way, they start getting chatty.
• Block you in and never let you leave.

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Examples:

RP Gs

• Elona Certain NP Cs in towns will talk to you if you walk into them. This can make getting around a hassle.