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I can't seem to find anything in the rule book for how to do perception checks for the Palladium systems (Palladium Fantasy RPG, Rifts, Dead Reign, etc). How do you do them? Is there a base attribute that can provide bonuses for this?

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I'd recommend you stop trying and find better systems. Palladium is notorious for their horrendous information architecture. Adopt the setting if you like –  edgerunner May 6 '12 at 15:55
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4 Answers

up vote 2 down vote accepted

The obvious base attribute is intelligence.

I'd recommend adopting the system used for stat check in BRP (especially given Palladium does not conform to the 3d6 for all stats):

Perception is IQ x 5 as a percentage. If you want to make something harder to perceive drop the 5 to a lower number. If they are trying to perceive a person hiding have both roll and the highest successful value succeeds. So someone with hide of 40% versus someone with an IQ of 12 (60% perception) could see the following:

Roll of 30 vs roll of 20: both succeed but the character is not seen. Roll of 40 vs roll of 41: both succeed but the character is seen...this shows and advantage of the system, higher skill gives you a better chance to beat the lower skill if both succeed.

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Awesome, I love it. What is BRP though? –  cmcculloh Aug 20 '10 at 15:33
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Just found the actual answer, but can't edit the answer as I don't have enough rep yet. Here it is: Originally Posted by Beyond the Supernatural, page 170 Perception Table by Difficulty 4 or Better : An Easy, Situation Circumstance 8 and Better : Moderate 14 & Better : Challenging 17 & Better : Difficult Taken from here: forum.rpg.net/showthread.php?t=263656 Also apparently rules in pg. 66-67 of the Nightbane RPG (palladium-megaverse.com/questions/noncombat.html) –  cmcculloh Aug 21 '10 at 0:12
    
BRP = Basic Roleplaying. As user46 pointed out it is the system in Call of Cthulhu but it older than that. I originally appeared in Runequest in the late 70s and is Chaosium's house system. –  HerbN Aug 22 '10 at 19:36
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Perception is covered in Palladium in 2 other products- Dead Reign and Rifts Unlimited Edition, page 367. To sum:

Roll on D20-
Easy: 4
Moderate: 8
Challenging: 14
Difficult: 17
Masterful: 19

Perception & Skills: Skills such as Prowl, Concealment, etc add to Perception. + 1 every 10 points of skill. Use common sense… prowl does not help in discovering a secret door.

Bonuses are from ME or IQ, depending on GM's preference- most use ME with the save vs. Psionics progression table.

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Closest thing I know is Locate Secret compartments and doors. Outside of that it would need to be houseruled. I tihnk the IQx5 posted above is a good way to handle it. BRP is the call of cthulhu RPG rule system.

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There are several methods you can use or adopt:

  • Roll 1D20 versus a target number set by the difficulty of detection.
  • Roll under a trait, such as intelligence
  • Derive a percentage from a stat or stats and apply modifiers set by the difficulty of detection. (as in BRP)
  • Determine by GM fiat what is or is not detected based on character traits and training, the conditions in the scene, and the needs of the story.

Key things to remember are that there are specific detection skills representing training for finding certain things (such as secret doors), and there are specific skills for stealth. Stealth-related skills, when rolled indicate success or failure and do not invite an opposed roll or other contest between two or more characters for detection.

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