So I've noticed in the core rulebook that in a lot of the descriptions to weapon quality bonuses, pages 115 to 117, there are numerous mentions of percentages where I would normally expect a strict number to be. I'll explain what I mean.

For example, the "unbalanced" weapon quality states that "these kinds of weapons impose a -10% penalty when used to parry". Now, do the rules actually mean -10% or simply a -10 to the test?

Another example is with the "Twin-linked" quality. It states that "A weapon with the Twin-linked quality gains a +20% bonus to hit when fired." Again, does it actually mean +20% or simply a +20 to the ballistics check?

I would normally just take it as written, but this just doesn't make sense as almost everything else in the game just goes with straight +/- 10, 20, 30 etc. to the skill test and these are rather odd circumstances with which to attach a percentage to.

Anyway, hope I made sense.

Annoyingly inconsistent isn't it? All checks are against a percentile dice roll, so they should all be %. That's pretty much it.

Well the way i understood it was.. Add/subtract the mentioned number from you current Skill..

1. If you got a Willpower of 40 and you get a bonus 20%, your total should be 48 WP.

2. If you got a willpower of 40 and you get a 20% bonus, your total should be 60 WP.

Which one is the right way to do it???

Ok I think I get it now. On page 114 of the Core Rulebook, under class it describes how pistols with the scatter quality being fired in melee do not grant the +30% bonus for being at point blank range. However, later in the rulebook on page 247, it states that firing from point blank range grants a +30 to BS. This later entry on page 247 leaves out the percentage altogether. So as Larkin said, I believe its all the same thing, just for whatever reason, multiple writers probably, it wasn't written consistently.

Thanks for the help.

Oh thank god i was doing it right.

Thanks Larkin.

Come on now, you didn't seriously believe that this game expects you to calculate complex percentages on the fly, did you? As far as I can recall, all addition and subtraction that involves the % sign refers to percentiles, not percentages.

Percentile tests? Oh no…..

What distribution profile should I assume? Gaussian, Laplace, Poisson? As a GM am I meant to decide which is more appropriate to the situation? I would guess that Poisson was most common, but what EV, CoV and MD do I use?

FFG has really not given enough support for GMs on this.