Tra v eller T org Tw il ight ▁ 2 0 0 0 W ast eland Re ferences ▁ ▁Further ▁reading ▁An on ▁ 1 9 8 1 . ▁' R P GA ▁Inter view ▁with ... ▁Jim ▁Ward .' ▁R P GA ▁News , ▁ 3 : 6 - 1 2 ▁( W inter ▁ 1 9 8 1 - 8 2 ). ▁An on ▁ 1 9 8 2 . ▁' R P GA ▁Inter view ▁with ... ▁" J ake " ▁Ja quet .' ▁Poly hed ron , ▁ 4 : 6 - 1 0 ▁( 1 9 8 2 ). ▁R abe , ▁Jean ▁▁ 1 9 8 7 . ▁ ▁' Not es ▁from ▁H Q ,' ▁Poly hed ron , ▁ 3 8 : 3 , 2 3 ▁( 1 9 8 7 ). ▁Ward , ▁James ▁and ▁Harold ▁Johnson ▁ 1 9 8 6 . ▁' Gamma ▁III .' ▁Dragon , ▁ 1 1 7 : 7 6 - 8 0 ▁( Jan ▁ 1 9 8 6 ). ▁Williams , ▁Sk ip ▁ 1 9 8 9 . ▁' Ad vice ▁for ▁All ▁Mut ants .' ▁Dragon ' ', ▁ 1 4 9 : 2 8 - 3 0 ▁( S ep ▁ 1 9 8 9 ). ▁ ▁Category : Al tern ity ▁Category : D 2 0 ▁System ▁▁ ▁Category : Post - ap oc aly ptic ▁role - play ing ▁games ▁Category : Role - play ing ▁games ▁introduced ▁in ▁ 1