Steve Jackson Games - Site Navigation
Home General Info Follow Us Search Illuminator Store Forums What's New Other Games Ogre GURPS Munchkin Our Games: Home

Go Back   Steve Jackson Games Forums > Roleplaying > GURPS

Reply
 
Thread Tools Display Modes
Old 02-11-2019, 04:20 AM   #1
muduri
 
Join Date: Oct 2009
Location: Alphabet City, New York
Default statting a doppelgänger

It's great to have totally new-to-the-game players sometimes because they make decisions like, "a doppelgänger ate our companion and assumed his identity? He just needed friends - let's adopt him!" Who am I to object? So now we have a doppelgänger PC.

What I haven't totally figured out yet is how to stat the shapeshifting ability. The initial premise would be that on consuming a humanoid, he takes on all but their IQ and magical abilities (and maybe even those on a critical success - perhaps on Cooking, haha), irreversibly for say a week unless consuming someone else, but then reverting over the course of a day to his initial form and starving after another few days.

That sounds like a variation of Shapeshifting with Retains Shape - but with some important differences. Any thoughts? Curious also if being able to switch back to his doppelgänger form at will would make it a much simpler Shapeshifting with some unusual Limitations. Thanks for the input!
muduri is offline   Reply With Quote
Old 02-11-2019, 08:23 AM   #2
naloth
 
Join Date: Sep 2004
Default Re: statting a doppelgänger

Just shifting his appearance to another person roughly the same size would be rather easy with Morph. You also certainly have enough limitations to bring it down to -80% (same size, requires consuming sample, minimum time and max time, etc).

You'd probably need Modular Points (physical only?) to emulate taking on new abilities temporarily since Morph is more geared towards just altering racial templates and not mimicking personal traits. You could limit that similarly to bring the cost down.
naloth is offline   Reply With Quote
Old 02-11-2019, 08:52 AM   #3
ericthered
Hero of Democracy
 
ericthered's Avatar
 
Join Date: Mar 2012
Location: far from the ocean
Default Re: statting a doppelgänger

Quote:
Originally Posted by naloth View Post
Just shifting his appearance to another person roughly the same size would be rather easy with Morph. You also certainly have enough limitations to bring it down to -80% (same size, requires consuming sample, minimum time and max time, etc).

You'd probably need Modular Points (physical only?) to emulate taking on new abilities temporarily since Morph is more geared towards just altering racial templates and not mimicking personal traits. You could limit that similarly to bring the cost down.

The new abilities would be included in the morph. The only thing you would need modular points for would be skills.



You can certainly make a morph build, but what you describe actually sounds closer to possession to me. You get what is functionally a copy of the host's body, must have a host to take that form, must overcome the host first, and you're copying an individual rather than a template. I'd guess that only being able to possess the freshly killed is a touch less restricting that puppet only, for -20%. I don't know how much of the victim's memory the doppelganger picks up but possession has those modifiers built in and morph does not.



Preparation required is likely appropriate for any version of the advantage. Requiring a skill (like cooking) to use an advantage that already requires an attribute roll is a feature.



Requiring a new body every few weeks sounds like a dependency to me. I'd say that fresh corpses are common but illegal for a base of -15, and a weekly dependency should be the right rate.



Loosing the body shape before at 1 week normally wouldn't give you any points for maximum duration or anything, but in this context I'd allow a -5% nuisance effect on possession.



I hope this helps.
__________________
Worlds Beyond Earth -- my blog
ericthered is offline   Reply With Quote
Old 02-11-2019, 09:31 AM   #4
naloth
 
Join Date: Sep 2004
Default Re: statting a doppelgänger

Quote:
Originally Posted by ericthered View Post
The new abilities would be included in the morph. The only thing you would need modular points for would be skills.
While that's certainly a valid house rule*, morph only has provisions for swapping out your base racial template and further increasing your personal appearances.

*You'd have to be careful to keep this from eclipsing Modular Abilities for a fraction of the cost.

Quote:
You can certainly make a morph build, but what you describe actually sounds closer to possession to me.
I looked at that, since effectively they are becoming that person rather than just duplicating them for a time. If you don't mind fixing the resistance/recovery issues, then it should work.

Quote:
Requiring a new body every few weeks sounds like a dependency to me. I'd say that fresh corpses are common but illegal for a base of -15, and a weekly dependency should be the right rate.
It's probably both a limit on the duration and a severe dependency. I can't imagine locals will be that happen if you need fresh kills.
naloth is offline   Reply With Quote
Old 02-12-2019, 11:20 AM   #5
muduri
 
Join Date: Oct 2009
Location: Alphabet City, New York
Default Re: statting a doppelgänger

Very interesting, thanks for both of those. I'll start with Morph and some specific limitations, but a tweaked version of Possession a very intriguing build also. Thanks!
muduri is offline   Reply With Quote
Old 02-12-2019, 11:43 AM   #6
Anthony
 
Join Date: Feb 2005
Location: Berkeley, CA
Default Re: statting a doppelgänger

Quote:
Originally Posted by naloth View Post
I looked at that, since effectively they are becoming that person rather than just duplicating them for a time. If you don't mind fixing the resistance/recovery issues, then it should work.
Affliction (Puppet; Temporary Disadvantage: Terminally Ill).
__________________
My GURPS site and Blog.
Anthony is offline   Reply With Quote
Old 02-12-2019, 11:47 AM   #7
naloth
 
Join Date: Sep 2004
Default Re: statting a doppelgänger

Quote:
Originally Posted by Anthony View Post
Affliction (Puppet; Temporary Disadvantage: Terminally Ill).
Entertaining, but it would require more modifications (ignore DR, duration) and in the end isn't it about the same chance to resist as just doing a possession?
naloth is offline   Reply With Quote
Old 02-12-2019, 02:09 PM   #8
Anthony
 
Join Date: Feb 2005
Location: Berkeley, CA
Default Re: statting a doppelgänger

Quote:
Originally Posted by naloth View Post
Entertaining, but it would require more modifications (ignore DR, duration) and in the end isn't it about the same chance to resist as just doing a possession?
Doesn't have the chance of the target becoming permanently immune.
__________________
My GURPS site and Blog.
Anthony is offline   Reply With Quote
Old 02-12-2019, 02:18 PM   #9
naloth
 
Join Date: Sep 2004
Default Re: statting a doppelgänger

Quote:
Originally Posted by Anthony View Post
Doesn't have the chance of the target becoming permanently immune.
That is compelling and it would be rather annoying after the kill to not be able to use that person.
naloth is offline   Reply With Quote
Old 02-12-2019, 02:24 PM   #10
Anthony
 
Join Date: Feb 2005
Location: Berkeley, CA
Default Re: statting a doppelgänger

"Doppelganger Worm"
Doppelganger worms have in the past been believed to be shapeshifters, but this is a misconception. They are actually worms that burrow through flesh, house themselves in the victim's brain, and pretend to be the victim, until eventually they burst out and attack their next victim.

Advantages:
Permeation (Flesh) [5]
Possession (Assimilation, Parasitic) [50]
Sharp Teeth [1]

Disadvantages:
Dependency (Sentient Brains; Common, Illegal, Daily) [-45]
Secret (Possible Death) [-30]
__________________
My GURPS site and Blog.
Anthony is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Fnords are Off
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 04:49 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.