Game guide:Which NPCs are safe to play as?

You may know some of the townies and non-playable characters (NPCs) available in the Sims 2, but playing with some of them is considered to be dangerous and a threat to the game (the neighborhood itself and the game as a whole, including installation files), though, some are just considered to be annoying and others are actually safe to play and add to households.

The dangers of certain NPCs
Dangerous NPCs are objects or characters that, if played with and have anything changed about them, may threaten the safety of your entire game. They should never be played with and/or added to a household. The following list consists of NPCs that are considered to be dangerous. Each NPC is listed below with the reason to why they are NOT safe and are dangerous when interacted with in any other way than what the game intends to. You may also want to consult the article on avoiding corruption first, for more details about how interactions with certain NPCs will affect your neighborhood and your Sims 2 game installation files. Interacting with these NPCs:
 * 1. By using the options allowed by the game in normal game play without cheating, AND
 * 2. By setting your objects.package files to read-only status,

Are considered safer and should not affect the integrity of your game.

A general rule of thumb to know whether an NPC is dangerous or not, is by not playing with those without a "proper name" i.e., Wise Old Man is not a proper name, whereas Brandi LeTourneau is a proper name. There are some exceptions, such as Rod Humble, who has a "proper" name yet is not a "safe" NPC. Read the following list carefully to make sure which NPCs are safe and which aren't.

Another rule of thumb is that if you have to cheat to get them selectable, leave them alone.

NPCs who are considered dangerous
NPCs that are not safe to play as and/or to add to your household because they are objects in your game's objects.package file: Messing with these may result in having to reinstall the entire game.


 * Bigfoot Bigfoot (NPC)


 * This does not apply to the bigfoot character from Exotic Destinations, as they are cloned from this object template. The clone is an active Sim with playable character data.


 * Bird
 * Father Time
 * Food Table Judge
 * Genie
 * Good Witch Cat
 * Grim Reaper
 * Hula Zombie
 * ideal plantsim


 * This is not a normal PlantSim but a "hidden" one with the genetics used when a safe PlantSim, such as Rose Greenman, spawns a toddler.


 * Mrs. CrumpleBottom
 * Penguin
 * The penguin appears in Seasons and above when multiple snowmen are built on the lot.


 * Pollination Technician


 * Not to be confused with Pollination Technician #9 Smith from Strangetown. Pollination Technician #9 Smith is an active Sim with playable character data.


 * Remote Control Car
 * Robot


 * This does not apply to the Servo robot created from the Robot Crafting Station. When activated, the Servo will act like a regular Sim with playable character data. This refers to the ones such as the SentryBot.


 * Rod Humble
 * Not to be confused with any townie or anyone with a normal name that is safe. Rod Humble is a FreeTime NPC that brings you a computer on the household's first day. Like the Social Worker, you should not attempt to interact with him or set any flags with SimBlender (or similar) when he comes on the lot.


 * Santa Klaus
 * Stinky Skunk
 * Skunk Skin
 * Spectral Assistant
 * TemplateDog
 * Therapist (Shrink)
 * Toddler New Year
 * Witch Doctor (Shaman)

NPCs that are not safe to play as and/or to add to your household because they have incomplete user data: This will eventually corrupt your neighborhood and make it unplayable.
 * Big Boss (NPC)
 * ​The Big Boss was a scenario similar to the Headmaster Scenario that EA abandoned before the game's release.
 * This does not apply to the Big Boss NPCs that the game generates to respond to phone calls when a Sim calls in sick. The Big Bosses listed below have playable character data and names like regular Sims. They may also occasionally show up on community lots. This refers to the Big Boss NPC that was originally going to be used in the Big Boss scenario.


 * Break Dancers
 * Carpool Drivers
 * Such as for a Taxi, School Bus, Carpool, Ambulance, Pilot, etc. These people have real names such as David Thompson, but they are identifiable by their brown uniform.


 * Fire Dancers
 * Food Stand Chefs
 * Human Statues
 * Neutral Witches
 * Ninjas
 * Repo-men
 * Social Bunnies
 * Social Workers
 * In the event she's spawned through the Gypsy as a blind date, delete her with the move-objects cheat, just in case. Do not interact with the Social Worker or attempt to set any flags on her using SimBlender (or similar), for example, Crush or Married/Joined. This applies to all of the unsafe NPCs that visit lots.


 * Tour Guides
 * Villain ( Unsavory Charlatan )
 * Wise Old Man

NPCs that are believed not safe to play as and/or add to your household:
 * Bellhops
 * Ghost Captain
 * Hair Stylist

NPCs who are considered safe
NPCs that possess annoying hard-coded behavior but are safe to play as and/or add to your household. These glitches may be fixed using Cyjon's Debugger.

These NPCs usually have normal names (i.e. Gordon King, BJ Ryan, Marie Mazza, etc.) - and the rule of thumb at the beginning of the page notes that characters with normal names are considered safe. Be aware that not all NPCs with "normal" names are safe to play as.


 * Bartender
 * Safe, but their plumb-bobs may be in the wrong place.


 * Big Bosses
 * Safe, but their plumb-bobs may be in the wrong place.
 * Not to be confused with Big Boss (NPC), which is an object as listed above. These Sims are generated to respond to phone calls when a Sim calls in sick. They have Big Boss character data stored in their files, but they have normal names and playable character data, and can be interacted with like regular Sims. In addition to responding to phone calls, they may occasionally show up on community lots. But they are hard to distinguish from townies since they don't have a fixed uniform.


 * Burglar
 * Safe, but may continue with sneaking behavior.


 * Evil Mascot (Cow)
 * Safe, but may sometimes wear the cow costume even after being given different clothing.
 * Cheerleader
 * Safe but will continue cheering frequently.
 * Mr. Big / The Diva
 * Safe, but will continue to primp frequently.


 * Exterminator
 * Safe, but their plumb-bobs may be in the wrong place.


 * Grand Vampire/Vampiress
 * Gypsy Matchmaker
 * Safe but will continue with spit-polish behavior.


 * Headmaster
 * Safe, but their plumb-bobs may be in the wrong place.


 * Mascot (Llama)
 * Safe, but may continue to wear the llama costume in certain circumstances even when changed out of it.


 * Nanny
 * Safe but will continue with insane behavior.


 * Professor
 * Believed safe but Drama Professors will continue with flirty behavior.


 * Repairman
 * Safe, but their plumb-bobs may be in the wrong place.


 * Slob
 * Safe, but will continue to burp and fart frequently.


 * Streaker

NPCs that are safe to play as and/or add to your household:

These NPCs will also have a "normal name".


 * Barista
 * Bigfoot
 * This is for the Bigfoot character seen from your forest vacation's secret lot. Not to be confused with Bigfoot Bigfoot (NPC), which is an object as listed above. The name for the safe Bigfoot will be ____ Bigfoot, depending on the one loaded first.


 * Butler
 * Cash Register Clerk
 * Cafeteria Chef


 * The one which is spawned with ShinyTyme Cooktop in University subhoods.


 * Chef/Cook
 * Not to be confused with a Food Stand Chef, who is an NPC.


 * Chinese/Pizza/Grocery Delivery Person
 * Do not confuse with the carpool/taxi drivers who are not safe. These are the ones who get out of the vehicle to deliver stuff.
 * Coach
 * Dining Podium Host
 * DJ
 * Dormie
 * Downtownie
 * Firefighter
 * Gardener
 * High Witches/Warlocks
 * Hobby Instructor
 * Housekeeper
 * This is for the housekeeper that spawns at hotels.
 * Landlord
 * Maid
 * Mail Carrier
 * Masseuse
 * Newspaper Delivery Person
 * Obedience/Pet Trainer
 * Police Officer
 * Reporter


 * These are NPCs that may come to owned business lots, browse the shop, and review it. They can't be distinguished from townies, unless they are seen taking notes. Otherwise known in real life as "Secret/Mystery Shoppers".
 * Server/Waiter
 * Social class townies
 * These are townies that will move in to apartments and are dressed in clothes relative to their social class.
 * Townie
 * This includes townies that are employed in an owned business.
 * Tourists
 * These are townies that you will see/meet at a Vacation Destination dressed in tourism clothes. Any children coming with them will not wear tourism clothes, such as Pong King.


 * Vacation Destinations Locals
 * These are townies you would normally see/meet during a vacation in a Vacation Destination and will be dressed according to the theme of the vacation. They will be wearing clothes that represent the area, such as Jace Fuchs wears lumberjack clothes.

Note:
These three lists are still incomplete and more will be added to them in the future.