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 06-07-2017, 09:39 PM   #1
Wurok
 
Join Date: Feb 2017
Default Rules to condense multiple similar rolls?

Are there any rules to condense the success or failure of multiple rolls?
For example, say players are traveling for 30 days through wilderness, is there a way to make a single concise Survival roll instead of 30 Survival rolls, one for each day?

I was thinking of using the standard probability table, and trying to add some variation with rolls, but haven't got anything that makes sense.
Wurok is offline   Reply With Quote
Old 06-08-2017, 02:46 AM   #2
weby
 
weby's Avatar
 
Join Date: Oct 2008
Default Re: Rules to condense multiple similar rolls?

Normally such rolls are not made at all, or at mostly monthly rolls or similar.

Only meaningful rolls should be done. See when to roll on B343.
__________________
--
weby's gaming stuff: http://weby.roto.nu
weby is offline   Reply With Quote
Old 06-08-2017, 02:55 AM   #3
Wurok
 
Join Date: Feb 2017
Default Re: Rules to condense multiple similar rolls?

They are nor trivial rolls, however. Without food or water, the PCs could suffer some reasonable harm. Just saying "you take your time and cross the jungle, foraging when you need to" is not really something minor. There is a considerable danger to the travel.

I'm not talking about foraging walking from city to city in some pseudo-medieval world, I'm talking about crossing a jungle, a desert, a savanna, etc.
Wurok is offline   Reply With Quote
Old 06-08-2017, 04:08 AM   #4
Taneli
 
Join Date: Aug 2004
Location: Helsinki, Finland
Default Re: Rules to condense multiple similar rolls?

My gut instinct would be to have them make enough rolls to get the combined margin of success to 30+ in you example case, and in case of a failure they would waste more time (and require more MoS to make up for it), and in the case of a critical failure they would face a mishap of some sort and then we would focus on that situation.

Or, you could just have them make one Survival roll and go with that, assuming that the jungle was "just for colour" and the meat of the adventure was the thing on the other side of the jungle. Heck, in a sufficiently high-powered / cinematic / skilled setting / party I could just state that "30 days of jungle later..." and maybe have them roll vs. Survival once in case I wanted to have a chance to introduce a minor complication, or call the attention to the awesome skills of the Survival experts in the party.

All that said, if anyone has any good ideas on the topic, I'd be interested in hearing you out too!
__________________
[/delurk]
AotA is of course IMHO, YMMV.
vincit qui se vincit
Taneli is offline   Reply With Quote
Old 06-08-2017, 05:59 AM   #5
DanHoward
 
DanHoward's Avatar
 
Join Date: Mar 2005
Location: Maitland, NSW, Australia
Default Re: Rules to condense multiple similar rolls?

If they are just travelling through then a single Survival roll would probably suffice. If the campaign revolves around survival in the jungle/desert/etc then I probably wouldn't allow a generic Survival roll at all. I'd want it to be roleplayed out with a plan and specific tasks that need to be done each day.
__________________
Compact Castles gives the gamer an instant portfolio of genuine, real-world castle floorplans to use in any historical, low-tech, or fantasy game setting.

Last edited by DanHoward; 06-08-2017 at 06:02 AM.
DanHoward is offline   Reply With Quote
Old 06-08-2017, 08:19 AM   #6
Bruno
 
Bruno's Avatar
 
Join Date: Sep 2004
Location: Canada
Default Re: Rules to condense multiple similar rolls?

By the time you're looking at 30+ rolls, why not look up the character's effective skill on the Probability of Success table, B171? They succeed at that many rolls (round to the nearest whole number, or round towards even, whichever you prefer).

Example, assuming 'round to nearest':
A Survival expert (skill 12) with +2 quality bonus has an effective skill of 14, and succeeds 90.7% of the time. For 30 rolls, that's 90.7% * 30 = 27 successful rolls (and 3 failures).
A Survival n00b (skill 9) with improvised equipment (-2) has an effective skill of 7 and succeeds 16.2% of the time. For 30 rolls, that's 5 successful rolls (and 25 failures).

Characters with Luck are a little more complicated but using http://anydice.com/ I believe it's the following table:
Code:
Effective
Skill		 %
3		  1.38
4		  5.45
5		 13.26
6		 25.29
7		 41.16
8		 59.36
9		 75.59
10		 87.50
11		 94.73
12		 98.26
13		 99.57
14		 99.92
15		 99.99
16+		100.00
(Anydice program link: http://anydice.com/program/bf0c - you can find chance of success for GURPS by using the At Most tab)
__________________
All about Size Modifier; Grand Unified Hit Location Table
A Wiki for my F2F Group
Bruno is online now   Reply With Quote
Old 06-08-2017, 10:01 AM   #7
Phantasm
 
Phantasm's Avatar
 
Join Date: Jun 2006
Location: On the road again...
Default Re: Rules to condense multiple similar rolls?

For a quick travel montage, I may just go "okay, what's everyone's margin of success if you rolled a 10 on your Survival skills?" and just run with it. Sometimes, you don't even want to roll. But then, doing a "Take 10" variant is a house rule, not official.

Another similar issue I've discovered, though, is someone who has to roll Precognitive Parry every turn in combat, sometimes multiple times per turn, and then a Parry Missile Weapons Parry roll. (This is on top of the increasing penalties for parrying every time he has to roll a Parry.) In this case, I just say "roll Precog Parry" at the start of the player's turn and let him use that roll - good or bad - for all incoming attacks.
__________________
"But mom, I don't wanna go back in the dungeon!"

The GURPS Marvel Universe Reboot Project and its not-a-wiki-really web adaptation.
Ranoc, a Muskets-and-Magery Renaissance Fantasy Setting
Phantasm is offline   Reply With Quote
Old 06-08-2017, 10:43 AM   #8
Rasputin
 
Rasputin's Avatar
 
Join Date: Jan 2005
Location: Minneapolis, MN, USA
Default Re: Rules to condense multiple similar rolls?

I had the same question a few years ago, and came up with this.
__________________
Cura isto securi, Eugene.

My GURPS blog.
Rasputin is offline   Reply With Quote
Old 06-08-2017, 01:18 PM   #9
Wurok
 
Join Date: Feb 2017
Default Re: Rules to condense multiple similar rolls?

Quote:
Originally Posted by Rasputin View Post
I had the same question a few years ago, and came up with this.
Thank you. This is the sort of thing I was looking for. Do you have any experience with actually using it in-game?
Wurok is offline   Reply With Quote
Old 06-08-2017, 01:36 PM   #10
Rasputin
 
Rasputin's Avatar
 
Join Date: Jan 2005
Location: Minneapolis, MN, USA
Default Re: Rules to condense multiple similar rolls?

Quote:
Originally Posted by Wurok View Post
Thank you. This is the sort of thing I was looking for. Do you have any experience with actually using it in-game?
Strangely, only a little, though it generally works. One of my players likes rolling all ten Survival checks. (I don't get it either but, since he plays the barbarian, maybe he likes all the successes.) To keep things even, I set up a macro in Dicenomicon to handle ten rolls and use that for everyone else.
__________________
Cura isto securi, Eugene.

My GURPS blog.
Rasputin 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 06:45 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.