Chartauk wrote:
CoC books looking for monsters and spells with a Lovecraft bent
For converting CoC spells, this is useful: https://eldritchfields.blogspot.com/2020/07/mythos-spells-to-osr-quick-dirty.html
For converting monsters, there was a free 1 pg document I dl'ed from Dragonsfoot I think ages ago, but I can't seem to find a link for it. I hope it's ok to paraphrase it here:
Attributes in Call of Cthulhu that simply have no counterpart in Hyperborea (e.g., STR, POW, APP, etc) thus those things can be safely ignored and do not need to be converted.
Armor Class: Subtract CoC creature's Armor Points from 10.
Move: Depends on edition. I know the older editions it was somewhat complicated. Add two to CoC creature's Move, multiply that by 2.5, you get close to a 20/30/40/50 move rate. I know the current edition (which I don't have) does movement differently. iirc, you multiply the Movement score by 5, divide by ½ to get the Hyperborea MV.
Hit Dice: Subtract 12 from CoC creature's average CON (minimum of one). I believe the current edition has Average HP so you can divide that number by 4 to get HD.
Damage/Attack: As specified in CoC. More or less.
Special Attack/Defenses (Including Spells): As specified in CoC, but choose spells from Hyperborea lists.
Magical Resistance: As specified in CoC.
Intelligence: Subtract one from CoC creature's average INT rating.
Size: A SIZ of 1 indicates a Tiny creature, a SIZ of 2-4 indicates a Small creature, a SIZ of 5-17 indicates a roughly man-sized creature, and a SIZ of 18 or higher indicates a Large creature. Again, that's for older editions. I think if you're converting the current edition you need to divide the average Size by 5.
I guess they multiplied everything by 5 for... bigger numbers? I dunno.
Experience point values for a creature are calculated using hit dice value adjusted for special attacks and defenses, as discussed in Hyperborea Ref's Manual, Experience.
Last edited by Jimm.Iblis (12/29/2021 5:59 pm)