d20 Conversion Guidelines/Notes/Instructions?

[mithrandir138]

I have performed some searches on the forum and I have seen some people talking about this, but I can't seem to find a definite set of guidelines for converting things from d20 to Legend. I am somewhat of a d100/BRP/RuneQuest/Legend newbie, so be gentle

My thoughts on monsters is to find an analog in "Monsters of Legend" if I can and use that. I am also thinking of using Dan True's Eberron conversion for some things. However, I want to make sure I am doing things right as not to break anything. It stands to reason to me that some simple math can be done to change things over to percentiles for certain things, but I am sure there is some extra fudging that needs to happen.

My reasoning for doing things like this are to make use of the breadth of material/modules for d20 until I can learn the ropes of the system and I can focus on making my own stuff. I need some training wheels for a little bit

Thanks in advance, as I know this is probably an often asked question, and there is something somewhere that I just missed.

 

[strega]

You might want to try the Classic Fantasy yahoo group. Classic Fantasy is Basic D&D converted over to a BRP D100 game. They might have some 'rules' for conversion or just suggested ways of doing so. They've done B1 (In Search of the Unknown) and B2 (The Keep on the Borderlands) so you could download them to see how they've done the conversions.

Personally I just slot in appropriate creatures, usually less of them as combat encounters tend to be the worst/slowest part of a D&D module. I have a standard 'stat block' for dealing with doors and chests (type, Strength to break/lock picking - Easy, Hard etc.), a standard 'stat block' for traps, based off the RQ6 section on traps, a standard 'stat block' for poisons.

 

[DamonJynx]

It depends on what version of D20 you're trying to convert. NPC's are a lot easier than monsters. To convert an NPC from versions 3.0 and above, this is what I do:

• 1 Statistics: Use them as is changing WIS to POW. SIZ is either rolled or assigned based on description etc
  2. Attributes: CA's, HP and other attributes calculated normally.
  3. Skills: I look for similar skills multiplying the skill ranks x 5. In the case of skills where two D20 skill make up 1 Legend skill (Move Silently/Hide=Stealth for example) I average them out then do the math. If there are no 'swappable' skills I multiply the ability modifier x 5 add that to the base skill score (which I calculate normally) and see how that looks making minor adjustments based on level (or perhaps multiplying level x 5 or some such to arrive at a figure). As an example - a Level 12 Cleric has Knowledge (Religion) at 19, +4 wisdom modifier and maxed out to 15 ranks, so his Lore (Theology) would be 75% (15*5), and his Pact (God) would be either 60% (Level*5) or CHA+Ded POW+an appropriate multiple of 12. Combat skills are Base Skill + (D20 BAB*5).

Monsters are basically the same but you have to really think about SIZ and the number of CA as often they may vary to the standard calculation rules due to the nature of the beast, multi-limbed/headed for example.

It's not particularly elegant, but it gets the job done rather quickly and effectively. Major NPC's you would probably 'tweak' quite a bit to get the right feel and so on.