Conversion From Other Systems

If you are reverse-engineering a conversion, the following dice rolls convert directly to d6s as follows.

d20 Modern Purchase DC Conversion

Many games already use credits, gold, or dollars, and prices can convert straight over to WOIN.  d20 Modern uses a Purchase DC scale.  This converts as follows.

General Conversion Guidelines

The following comprises a number of individual conversion notes, although this will be more art than science.

• d20 levels are equal to two WOIN grades, starting at grade 5. To covert levels to grades, multiply the level by 2 and add 3. Monster CRs follow the same rule.

• d20 armor class translates directly to SOAK on a 1:1 basis.

• Divide d20 ability scores by 2 to get WOIN attributes.  STR, DEX, CON, INT, WIS, CHA are STR, AGI, END, LOG, INT, CHA respectively. Use WIS for WIL.

• Similarly, divide skill ranks by 2.

• For percentile systems, divide by 10 (round down). It generally assumes that a score of 100 is the maximum human score. For systems where 100 is the absolute maximum possible, you will need to establish the human average in that system and assign a value of 4 to it, and the human maximum (or likely maximum) and assign a value of 12 to it, and use those benchmarks to assign the rest accordingly. WOIN does not have an upper bound (instead using an exponential scale to increasingly reduce the benefit of higher and higher scores).