Houserules: Perception Teamwork

Perception is often rolled to see if someone notices a sneaker, a hidden object, a pickpocket or stuff like that. But there’s times where the Perception rolls seem a bit strange in execution. I’m listing a few of those situations below:


Say everyone’s together and something happens. They all get a Perception test, so you end up with some people rolling poorly and not noticing a thing, some decent, one or two rolling high and they all receive different intel and then quickly share it. If what they spot isn’t the equivalent of a Surprise test, the ‘some notice different things’ element just seems silly. Especially in cases where the team is clearly working together. You’re clearing a room? Investigating a mansion? Protecting someone and looking out for hostiles? Obviously you’re working together, so why are you all rolling separately? Why not a teamwork test?

Mathwise, by the way, the teamwork test likely will roll higher on average but with more extremes. It’s a bit related to how when you roll a test often, you’ll get relatively closer to the average, you get less extremes. A d12 has 1/3 chance to roll 9+ and 1/3 to roll 4-, while 2d6 is at 10/36 and 1/6 respectively. This gets you the kind of statistics I like in Shadowrun, but let’s leave that aside. So, summary: A Perception Teamwork test here would better represent your team actually working together, would have a slightly higher average but with more chance on the extremes due to boiling down to one final test.

One side-effect of this is Edging by the way. If you’re doing a teamwork test, you got more dice to Edge but it all boils down to a single person having to make the call on whether or not they use a point of Edge.


Drones can roll Perception, as Riggers are wont to do. Unfortunately Drones run into 1 big problem… Their Sensor Rating is 3, which is their Limit. So if you roll 3 hits on Sneaking versus half a dozen drones with Clearsight 6? Even if the Drones take a -3 circumstantial Perception penalty they’ll have only 68.04% chance to not roll 3 hits, chances not a single drone pierces your Sneaking is <10%. At the full 9 dice, only 3 drones put you at ~5%.

On the other hand, if you roll 4 hits, even if they have their full 9 dice they now don’t stand a chance, simply because of their limit. So the entire drone-spy-network thing is utterly useless all of a sudden, only jumped-in can a Rigger stand a chance (or they could pay thousands to upgrade each drone…)

Teamworkwise, however, suddenly the drones will do rather decent. With several drones they’ll likely hit the maximum 15 teamwork dice, which puts you at ~60% to hit 5+ hits. Suddenly a properly-deployed network of spy-drones can truly serve as a Rigger’s Eyes! And even with just two they already can up their limit to 5!

Now granted, a GM may want to put restrictions on this. One option would be to require them being slaved to the same RCC, or even running a communication program (taking a program slot!) as well. In that case non-streaming drones would need to run their own, streaming drones could get it from the RCC. Your call really. I’d go with RCC-slaving, to further reward RCC-owners for going the extra mile. 🙂


Concealment, giving a penalty to physical detection, is real nasty against mooks. Quite often they’ll have 0 or nearly no dice left, giving them zero chance to ever detect the players. It’d be more fun if they’d still receive a bit of risk, through other means than ‘okay they just get plenty of extra dice each!’ Adding their PR (like with social resists) would be a bit weird since it’d mean that high-Perception people get a bigger bonus, since better PR translates to better stats and skills already.

So instead teamwork would be allowed only in professional settings, so a group of NPCs doing a big search and stuff like that. You randomly surprise them, they still roll individually, but if a team is trying to hunt you down specifically… Of course this rule has 1 big problem: It screws over non-Concealment players. 15 Sneaking versus 10 Perception is good, 15 Sneaking versus 15~18 Perception will do poorly.


All in all, just take a look at the circumstances and see if you’ll use some of these at your table (though for Drones, I strongly recommend it no matter what!). I can note that the third one added some excitement to Black Hearts #5: Biggest Guns.

Rule: Under Professional Circumstances players can teamwork Perception

(This of course does not EVER apply in Surprise Tests.)

Rule: Drones can teamwork Perception when slaved to the same RCC

Rule: Under Professional Circumstances enemies can teamwork Perception






http://www.AnyDice.com formulae used for this post, a d{0,0,1} simulates a Shadowrun die with 1/3 chance at a hit:

output [highest of [highest of [highest of [highest of 11d{0,0,1} and 11d{0,0,1}] and 10d{0,0,1}] and 9d{0,0,1}] and 8d{0,0,1}]
vs
output 17d{0,0,1}

output [highest of [highest of [highest of [highest of 14d{0,0,1} and 14d{0,0,1}] and 13d{0,0,1}] and 12d{0,0,1}] and 11d{0,0,1}]
vs
output 20d{0,0,1}

output [lowest of 3 and 6d{0,0,1}]
   (0.6802^6 = not anydice but just calculator)
output [lowest of 5 and 15d{0,0,1}]
output [lowest of 10 and 15d{0,0,1}]