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Old 09-29-2017, 03:03 PM   #1
Kopheay
 
Join Date: Jul 2017
Default GURPS-Car Wars skill equivalency equation

I have a relatively new-to-GURPS GM friend hosying a mad max campaign. Im the most experienced with both that and car wars among my friends, and the GM likes the udea of using both systems. Car Wars for cars, GURPS for roleplay and infantry combat.

Since im the experienced one I'm the default tutor and ref. The way I see it there are three things that need a translation between systems.

1. Damage, health, armour scale
2. Time scale/distance units
3. Skill equivalency

Possible solutions:
1. Pentascale? Decade seems off but 5x is pretty close.
And maybe 10x for component HP on cars.
2. Either just have infantry do a gurps turn at the end of every CW round
Maybe just use csr wars infantry rules whenever cars are involved at all
3. Figure out an equation that gives the same % to succeed on several
example tasks of varying difficulty and use that actoss the board?

Thoughts? Suggestions?

Note: "Don't do that" isn't a helpful suggestion, we're doing this for fun!
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Old 09-29-2017, 03:22 PM   #2
Phantasm
 
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Default Re: GURPS-Car Wars skill equivalency equation

I'm not sure how Car Wars scales its HP. However, vehicles and other machines in GURPS have an equation in the back of Basic Set: Campaigns which if I'm not mistaken is 4x the cube root of the mass/weight in pounds. I'd figure the Car Wars and GURPS damages proportionately; if an attack in CW reduces the car's HP by 20%, take 20% off the GURPS HP and vice verse. A car's mounted weapon against infantry I'd probably use an equivalent GURPS weapon's damage; if it's a 5.56mm NATO machine gun on the car, I'd have the gun doing 5d pi against infantry, like the M249 SAW. A car mounting an M60 GPMG would do 7d pi to infantry. Infantry firing their M16-esque weapons at the cars would have to deal with the cars' GURPS DR and HP.

YMMV, of course, but that's how I'd start working things.

(Then again, I'm a nutcase that once ran a game with players using different systems: D20 Modern, GURPS, Palladium, and Shadowrun 3e all at once. 'Twas interesting when it came to handling initiative, and cross-system weapon damages.)
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Old 09-29-2017, 03:42 PM   #3
Refplace
 
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Default Re: GURPS-Car Wars skill equivalency equation

Depends on the edition of Car Wars your using and I dont recall the rules real well anyhow. However an option is to just use Car Wars rules for combat and GURPS for the skill and PC stuff.
Skill checks are 1d6?
If so how about this very rough approximation.
Car Wars GURPS Skill
3 12-
4 14-
5 16-
6 20-
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Old 09-29-2017, 05:31 PM   #4
johndallman
 
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Default Re: GURPS-Car Wars skill equivalency equation

I seem to recall there was an edition of GURPS Autoduel many years ago that interfaced the two games. GURPS has changed a bit since then, but its skills and character hit points are on the same scales as they're always been.

Edit: the two editions of Autoduel are available on Warehouse 23. I think First Edition has that material, but I'm not sure. Second Edition.

Last edited by johndallman; 09-29-2017 at 05:36 PM.
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Old 09-29-2017, 08:40 PM   #5
Joe
 
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Default Re: GURPS-Car Wars skill equivalency equation

Quote:
Originally Posted by Phantasm View Post
(Then again, I'm a nutcase that once ran a game with players using different systems: D20 Modern, GURPS, Palladium, and Shadowrun 3e all at once. 'Twas interesting when it came to handling initiative, and cross-system weapon damages.)
[Digression]
Holy cow! This is a rare and precious specimen of gamer madness, and I simply have to take a moment to cheer for it, even at the risk of hijacking the thread. I'd love to hear about how it went, some other time.
[/Digression]
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Old 09-30-2017, 02:29 AM   #6
RogerBW
 
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Default Re: GURPS-Car Wars skill equivalency equation

Quote:
Originally Posted by johndallman View Post
Edit: the two editions of Autoduel are available on Warehouse 23. I think First Edition has that material, but I'm not sure. Second Edition.
Yes. 1e integrates GURPS and Car Wars; 2e uses GURPS Vehicles.
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